CVE-2021-33909
Published · Updated
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 9.7%
exploitation probability
9.7%top 4% of all CVEs
observed exploitation
nono source reports it
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.
Affected products
n/a · n/aReferences
http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.htmlhttp://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.htmlhttp://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.htmlhttp://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.htmlhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53bhttps://lists.debian.org/debian-lts-announce/2021/07/msg00014.htmlhttps://lists.debian.org/debian-lts-announce/2021/07/msg00015.htmlhttps://lists.debian.org/debian-lts-announce/2021/07/msg00016.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015https://security.netapp.com/advisory/ntap-20210819-0004/