CVE-2021-33909

Name
CVE-2021-33909
Description
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.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
CONFIRM https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
CONFIRM https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b
MISC https://www.openwall.com/lists/oss-security/2021/07/20/1
MLIST https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html
MLIST https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
MLIST https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html
DEBIAN https://www.debian.org/security/2021/dsa-4941
MISC http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/
MLIST http://www.openwall.com/lists/oss-security/2021/07/22/7
Third Party Advisory http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20210819-0004/
Mailing List http://www.openwall.com/lists/oss-security/2021/08/25/10
Third Party Advisory http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html
Mailing List http://www.openwall.com/lists/oss-security/2021/09/17/2
Mailing List http://www.openwall.com/lists/oss-security/2021/09/17/4
Mailing List http://www.openwall.com/lists/oss-security/2021/09/21/1
MISC http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html
Patch https://www.oracle.com/security-alerts/cpujan2022.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* linux_kernel >= 3.16 < 5.13.4

Vulnerable and fixed packages

Source package Branch Version Maintainer Status