CVE-2021-33909 - Hell bent Shat
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.
Reference
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b https://www.openwall.com/lists/oss-security/2021/07/20/1