Sequoia: CVE-2021-33909- Local Privilege Escalation Vulnerability in Linux’s Filesystem Layer

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.

Impact: Successful exploitation of this vulnerability allows any unprivileged user to gain root privileges on the vulnerable host.

Mitigation: Updates are available. Please see the references or vendor advisory for more information.

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