Vulnerabilities (CVE)

CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2010-3301 3 Canonical, Linux, Suse 3 Ubuntu Linux, Linux Kernel, Linux Enterprise Real Time Extension 2020-08-14 7.2 HIGH N/A
The IA32 system call emulation functionality in arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.36-rc4-git2 on the x86_64 platform does not zero extend the %eax register after the 32-bit entry path to ptrace is used, which allows local users to gain privileges by triggering an out-of-bounds access to the system call table using the %rax register. NOTE: this vulnerability exists because of a CVE-2007-4573 regression.
CVE-2010-3477 3 Canonical, Debian, Linux 3 Ubuntu Linux, Debian Linux, Linux Kernel 2020-08-14 2.1 LOW N/A
The tcf_act_police_dump function in net/sched/act_police.c in the actions implementation in the network queueing functionality in the Linux kernel before 2.6.36-rc4 does not properly initialize certain structure members, which allows local users to obtain potentially sensitive information from kernel memory via vectors involving a dump operation. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-2942.
CVE-2010-3080 4 Canonical, Linux, Opensuse and 1 more 6 Ubuntu Linux, Linux Kernel, Opensuse and 3 more 2020-08-14 7.2 HIGH N/A
Double free vulnerability in the snd_seq_oss_open function in sound/core/seq/oss/seq_oss_init.c in the Linux kernel before 2.6.36-rc4 might allow local users to cause a denial of service or possibly have unspecified other impact via an unsuccessful attempt to open the /dev/sequencer device.
CVE-2010-3067 5 Canonical, Debian, Linux and 2 more 8 Ubuntu Linux, Debian Linux, Linux Kernel and 5 more 2020-08-14 4.9 MEDIUM N/A
Integer overflow in the do_io_submit function in fs/aio.c in the Linux kernel before 2.6.36-rc4-next-20100915 allows local users to cause a denial of service or possibly have unspecified other impact via crafted use of the io_submit system call.
CVE-2010-2955 4 Canonical, Linux, Opensuse and 1 more 6 Ubuntu Linux, Linux Kernel, Opensuse and 3 more 2020-08-14 2.1 LOW N/A
The cfg80211_wext_giwessid function in net/wireless/wext-compat.c in the Linux kernel before 2.6.36-rc3-next-20100831 does not properly initialize certain structure members, which allows local users to leverage an off-by-one error in the ioctl_standard_iw_point function in net/wireless/wext-core.c, and obtain potentially sensitive information from kernel heap memory, via vectors involving an SIOCGIWESSID ioctl call that specifies a large buffer size.
CVE-2009-3612 5 Canonical, Fedoraproject, Linux and 2 more 7 Ubuntu Linux, Fedora, Linux Kernel and 4 more 2020-08-14 2.1 LOW N/A
The tcf_fill_node function in net/sched/cls_api.c in the netlink subsystem in the Linux kernel 2.6.x before 2.6.32-rc5, and 2.4.37.6 and earlier, does not initialize a certain tcm__pad2 structure member, which might allow local users to obtain sensitive information from kernel memory via unspecified vectors. NOTE: this issue exists because of an incomplete fix for CVE-2005-4881.
CVE-2010-3437 5 Canonical, Debian, Linux and 2 more 8 Ubuntu Linux, Debian Linux, Linux Kernel and 5 more 2020-08-13 6.6 MEDIUM N/A
Integer signedness error in the pkt_find_dev_from_minor function in drivers/block/pktcdvd.c in the Linux kernel before 2.6.36-rc6 allows local users to obtain sensitive information from kernel memory or cause a denial of service (invalid pointer dereference and system crash) via a crafted index value in a PKT_CTRL_CMD_STATUS ioctl call.
CVE-2012-3993 1 Mozilla 5 Firefox, Firefox Esr, Seamonkey and 2 more 2020-08-13 9.3 HIGH N/A
The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 does not properly interact with failures of InstallTrigger methods, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges via a crafted web site, related to an "XrayWrapper pollution" issue.
CVE-2010-3298 5 Canonical, Debian, Linux and 2 more 7 Ubuntu Linux, Debian Linux, Linux Kernel and 4 more 2020-08-13 2.1 LOW N/A
The hso_get_count function in drivers/net/usb/hso.c in the Linux kernel before 2.6.36-rc5 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via a TIOCGICOUNT ioctl call.
CVE-2012-4216 6 Canonical, Debian, Mozilla and 3 more 15 Ubuntu Linux, Debian Linux, Firefox and 12 more 2020-08-13 9.3 HIGH N/A
Use-after-free vulnerability in the gfxFont::GetFontEntry function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.
CVE-2012-4214 5 Canonical, Mozilla, Opensuse and 2 more 14 Ubuntu Linux, Firefox, Firefox Esr and 11 more 2020-08-13 9.3 HIGH N/A
Use-after-free vulnerability in the nsTextEditorState::PrepareEditor function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors, a different vulnerability than CVE-2012-5840.
CVE-2012-4182 5 Canonical, Debian, Mozilla and 2 more 14 Ubuntu Linux, Debian Linux, Firefox and 11 more 2020-08-13 9.3 HIGH N/A
Use-after-free vulnerability in the nsTextEditRules::WillInsert function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.
CVE-2012-4209 5 Canonical, Mozilla, Opensuse and 2 more 14 Ubuntu Linux, Firefox, Firefox Esr and 11 more 2020-08-13 4.3 MEDIUM N/A
Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 do not prevent use of a "top" frame name-attribute value to access the location property, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via vectors involving a binary plugin.
CVE-2012-4188 5 Canonical, Debian, Mozilla and 2 more 14 Ubuntu Linux, Debian Linux, Firefox and 11 more 2020-08-13 9.3 HIGH N/A
Heap-based buffer overflow in the Convolve3x3 function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code via unspecified vectors.
CVE-2012-3990 5 Canonical, Debian, Mozilla and 2 more 14 Ubuntu Linux, Debian Linux, Firefox and 11 more 2020-08-13 9.3 HIGH N/A
Use-after-free vulnerability in the IME State Manager implementation in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code via unspecified vectors, related to the nsIContent::GetNameSpaceID function.
CVE-2012-4207 6 Canonical, Debian, Mozilla and 3 more 15 Ubuntu Linux, Debian Linux, Firefox and 12 more 2020-08-13 4.3 MEDIUM N/A
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.
CVE-2012-4184 4 Canonical, Mozilla, Redhat and 1 more 13 Ubuntu Linux, Firefox, Firefox Esr and 10 more 2020-08-13 4.3 MEDIUM N/A
The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 does not prevent access to properties of a prototype for a standard class, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges via a crafted web site.
CVE-2012-4179 5 Canonical, Debian, Mozilla and 2 more 14 Ubuntu Linux, Debian Linux, Firefox and 11 more 2020-08-13 9.3 HIGH N/A
Use-after-free vulnerability in the nsHTMLCSSUtils::CreateCSSPropertyTxn function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.
CVE-2012-3995 4 Canonical, Mozilla, Redhat and 1 more 13 Ubuntu Linux, Firefox, Firefox Esr and 10 more 2020-08-13 9.3 HIGH N/A
The IsCSSWordSpacingSpace function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via unspecified vectors.
CVE-2014-5077 4 Canonical, Linux, Redhat and 1 more 8 Ubuntu Linux, Linux Kernel, Enterprise Linux Eus and 5 more 2020-08-13 7.1 HIGH N/A
The sctp_assoc_update function in net/sctp/associola.c in the Linux kernel through 3.15.8, when SCTP authentication is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by starting to establish an association between two endpoints immediately after an exchange of INIT and INIT ACK chunks to establish an earlier association between these endpoints in the opposite direction.
CVE-2012-5843 4 Canonical, Mozilla, Opensuse and 1 more 10 Ubuntu Linux, Firefox, Firefox Esr and 7 more 2020-08-13 9.3 HIGH N/A
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
CVE-2010-3297 5 Canonical, Debian, Linux and 2 more 7 Ubuntu Linux, Debian Linux, Linux Kernel and 4 more 2020-08-13 2.1 LOW N/A
The eql_g_master_cfg function in drivers/net/eql.c in the Linux kernel before 2.6.36-rc5 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via an EQL_GETMASTRCFG ioctl call.
CVE-2015-5706 3 Canonical, Debian, Linux 3 Ubuntu Linux, Debian Linux, Linux Kernel 2020-08-13 4.6 MEDIUM N/A
Use-after-free vulnerability in the path_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to cause a denial of service or possibly have unspecified other impact via O_TMPFILE filesystem operations that leverage a duplicate cleanup operation.
CVE-2012-5838 4 Canonical, Mozilla, Opensuse and 1 more 10 Ubuntu Linux, Firefox, Firefox Esr and 7 more 2020-08-13 9.3 HIGH N/A
The copyTexImage2D implementation in the WebGL subsystem in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via large image dimensions.
CVE-2010-1187 3 Canonical, Debian, Linux 3 Ubuntu Linux, Debian Linux, Linux Kernel 2020-08-13 4.9 MEDIUM N/A
The Transparent Inter-Process Communication (TIPC) functionality in Linux kernel 2.6.16-rc1 through 2.6.33, and possibly other versions, allows local users to cause a denial of service (kernel OOPS) by sending datagrams through AF_TIPC before entering network mode, which triggers a NULL pointer dereference.
CVE-2012-5836 4 Canonical, Mozilla, Opensuse and 1 more 8 Ubuntu Linux, Firefox, Seamonkey and 5 more 2020-08-13 7.5 HIGH N/A
Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving the setting of Cascading Style Sheets (CSS) properties in conjunction with SVG text.
CVE-2012-4217 4 Canonical, Mozilla, Opensuse and 1 more 9 Ubuntu Linux, Firefox, Seamonkey and 6 more 2020-08-13 9.3 HIGH N/A
Use-after-free vulnerability in the nsViewManager::ProcessPendingUpdates function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.
CVE-2012-4204 4 Canonical, Mozilla, Opensuse and 1 more 8 Ubuntu Linux, Firefox, Seamonkey and 5 more 2020-08-13 9.3 HIGH N/A
The str_unescape function in the JavaScript engine in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via unspecified vectors.
CVE-2010-3877 2 Debian, Linux 2 Debian Linux, Linux Kernel 2020-08-13 1.9 LOW N/A
The get_name function in net/tipc/socket.c in the Linux kernel before 2.6.37-rc2 does not initialize a certain structure, which allows local users to obtain potentially sensitive information from kernel stack memory by reading a copy of this structure.
CVE-2010-3876 4 Debian, Linux, Opensuse and 1 more 7 Debian Linux, Linux Kernel, Opensuse and 4 more 2020-08-13 1.9 LOW N/A
net/packet/af_packet.c in the Linux kernel before 2.6.37-rc2 does not properly initialize certain structure members, which allows local users to obtain potentially sensitive information from kernel stack memory by leveraging the CAP_NET_RAW capability to read copies of the applicable structures.
CVE-2010-3880 2 Debian, Linux 2 Debian Linux, Linux Kernel 2020-08-13 4.9 MEDIUM N/A
net/ipv4/inet_diag.c in the Linux kernel before 2.6.37-rc2 does not properly audit INET_DIAG bytecode, which allows local users to cause a denial of service (kernel infinite loop) via crafted INET_DIAG_REQ_BYTECODE instructions in a netlink message that contains multiple attribute elements, as demonstrated by INET_DIAG_BC_JMP instructions.
CVE-2010-4082 3 Linux, Opensuse, Suse 5 Linux Kernel, Opensuse, Linux Enterprise Desktop and 2 more 2020-08-13 1.9 LOW N/A
The viafb_ioctl_get_viafb_info function in drivers/video/via/ioctl.c in the Linux kernel before 2.6.36-rc5 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via a VIAFB_GET_INFO ioctl call.
CVE-2010-4081 4 Debian, Linux, Opensuse and 1 more 7 Debian Linux, Linux Kernel, Opensuse and 4 more 2020-08-13 1.9 LOW N/A
The snd_hdspm_hwdep_ioctl function in sound/pci/rme9652/hdspm.c in the Linux kernel before 2.6.36-rc6 does not initialize a certain structure, which allows local users to obtain potentially sensitive information from kernel stack memory via an SNDRV_HDSPM_IOCTL_GET_CONFIG_INFO ioctl call.
CVE-2010-4078 4 Debian, Linux, Opensuse and 1 more 7 Debian Linux, Linux Kernel, Opensuse and 4 more 2020-08-13 1.9 LOW N/A
The sisfb_ioctl function in drivers/video/sis/sis_main.c in the Linux kernel before 2.6.36-rc6 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via an FBIOGET_VBLANK ioctl call.
CVE-2010-4248 1 Linux 1 Linux Kernel 2020-08-13 4.9 MEDIUM N/A
Race condition in the __exit_signal function in kernel/exit.c in the Linux kernel before 2.6.37-rc2 allows local users to cause a denial of service via vectors related to multithreaded exec, the use of a thread group leader in kernel/posix-cpu-timers.c, and the selection of a new thread group leader in the de_thread function in fs/exec.c.
CVE-2010-4169 4 Fedoraproject, Linux, Opensuse and 1 more 6 Fedora, Linux Kernel, Opensuse and 3 more 2020-08-13 4.9 MEDIUM N/A
Use-after-free vulnerability in mm/mprotect.c in the Linux kernel before 2.6.37-rc2 allows local users to cause a denial of service via vectors involving an mprotect system call.
CVE-2009-3228 3 Canonical, Linux, Redhat 6 Ubuntu Linux, Linux Kernel, Enterprise Linux Desktop and 3 more 2020-08-13 2.1 LOW N/A
The tc_fill_tclass function in net/sched/sch_api.c in the tc subsystem in the Linux kernel 2.4.x before 2.4.37.6 and 2.6.x before 2.6.31-rc9 does not initialize certain (1) tcm__pad1 and (2) tcm__pad2 structure members, which might allow local users to obtain sensitive information from kernel memory via unspecified vectors.
CVE-2012-4213 4 Canonical, Mozilla, Opensuse and 1 more 10 Ubuntu Linux, Firefox, Firefox Esr and 7 more 2020-08-12 9.3 HIGH N/A
Use-after-free vulnerability in the nsEditor::FindNextLeafNode function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.
CVE-2012-4208 4 Canonical, Mozilla, Opensuse and 1 more 8 Ubuntu Linux, Firefox, Seamonkey and 5 more 2020-08-12 4.3 MEDIUM N/A
The XrayWrapper implementation in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 does not consider the compartment during property filtering, which allows remote attackers to bypass intended chrome-only restrictions on reading DOM object properties via a crafted web site.
CVE-2011-1044 2 Linux, Redhat 6 Linux Kernel, Enterprise Linux Desktop, Enterprise Linux Eus and 3 more 2020-08-12 2.1 LOW N/A
The ib_uverbs_poll_cq function in drivers/infiniband/core/uverbs_cmd.c in the Linux kernel before 2.6.37 does not initialize a certain response buffer, which allows local users to obtain potentially sensitive information from kernel memory via vectors that cause this buffer to be only partially filled, a different vulnerability than CVE-2010-4649.
CVE-2010-4668 1 Linux 1 Linux Kernel 2020-08-12 4.7 MEDIUM N/A
The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 2.6.37-rc7 allows local users to cause a denial of service (panic) via a zero-length I/O request in a device ioctl to a SCSI device, related to an unaligned map. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4163.
CVE-2010-4346 1 Linux 1 Linux Kernel 2020-08-12 2.1 LOW N/A
The install_special_mapping function in mm/mmap.c in the Linux kernel before 2.6.37-rc6 does not make an expected security_file_mmap function call, which allows local users to bypass intended mmap_min_addr restrictions and possibly conduct NULL pointer dereference attacks via a crafted assembly-language application.
CVE-2010-4080 4 Debian, Linux, Opensuse and 1 more 7 Debian Linux, Linux Kernel, Opensuse and 4 more 2020-08-12 2.1 LOW N/A
The snd_hdsp_hwdep_ioctl function in sound/pci/rme9652/hdsp.c in the Linux kernel before 2.6.36-rc6 does not initialize a certain structure, which allows local users to obtain potentially sensitive information from kernel stack memory via an SNDRV_HDSP_IOCTL_GET_CONFIG_INFO ioctl call.
CVE-2007-6206 6 Canonical, Debian, Linux and 3 more 12 Ubuntu Linux, Debian Linux, Linux Kernel and 9 more 2020-08-12 2.1 LOW N/A
The do_coredump function in fs/exec.c in Linux kernel 2.4.x and 2.6.x up to 2.6.24-rc3, and possibly other versions, does not change the UID of a core dump file if it exists before a root process creates a core dump in the same location, which might allow local users to obtain sensitive information.
CVE-2012-3988 4 Canonical, Mozilla, Redhat and 1 more 13 Ubuntu Linux, Firefox, Firefox Esr and 10 more 2020-08-12 9.3 HIGH N/A
Use-after-free vulnerability in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 might allow user-assisted remote attackers to execute arbitrary code via vectors involving use of mozRequestFullScreen to enter full-screen mode, and use of the history.back method for backwards history navigation.
CVE-2010-4079 2 Debian, Linux 2 Debian Linux, Linux Kernel 2020-08-12 1.9 LOW N/A
The ivtvfb_ioctl function in drivers/media/video/ivtv/ivtvfb.c in the Linux kernel before 2.6.36-rc8 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via an FBIOGET_VBLANK ioctl call.
CVE-2010-4165 3 Linux, Opensuse, Suse 5 Linux Kernel, Opensuse, Linux Enterprise Desktop and 2 more 2020-08-12 4.9 MEDIUM N/A
The do_tcp_setsockopt function in net/ipv4/tcp.c in the Linux kernel before 2.6.37-rc2 does not properly restrict TCP_MAXSEG (aka MSS) values, which allows local users to cause a denial of service (OOPS) via a setsockopt call that specifies a small value, leading to a divide-by-zero error or incorrect use of a signed integer.
CVE-2012-4196 5 Canonical, Mozilla, Opensuse and 2 more 14 Ubuntu Linux, Firefox, Firefox Esr and 11 more 2020-08-12 6.4 MEDIUM N/A
Mozilla Firefox before 16.0.2, Firefox ESR 10.x before 10.0.10, Thunderbird before 16.0.2, Thunderbird ESR 10.x before 10.0.10, and SeaMonkey before 2.13.2 allow remote attackers to bypass the Same Origin Policy and read the Location object via a prototype property-injection attack that defeats certain protection mechanisms for this object.
CVE-2012-4194 5 Canonical, Mozilla, Opensuse and 2 more 14 Ubuntu Linux, Firefox, Firefox Esr and 11 more 2020-08-12 4.3 MEDIUM N/A
Mozilla Firefox before 16.0.2, Firefox ESR 10.x before 10.0.10, Thunderbird before 16.0.2, Thunderbird ESR 10.x before 10.0.10, and SeaMonkey before 2.13.2 do not prevent use of the valueOf method to shadow the location object (aka window.location), which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via vectors involving a plugin.
CVE-2011-1083 3 Linux, Redhat, Suse 6 Linux Kernel, Enterprise Linux Desktop, Enterprise Linux Server and 3 more 2020-08-12 4.9 MEDIUM N/A
The epoll implementation in the Linux kernel 2.6.37.2 and earlier does not properly traverse a tree of epoll file descriptors, which allows local users to cause a denial of service (CPU consumption) via a crafted application that makes epoll_create and epoll_ctl system calls.