CVE-2021-33909

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Summary:

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 Links(if available):

  • 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
  • https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html
  • https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
  • CVSS Score (if available)

    v2: / MEDIUMAV:L/AC:L/Au:N/C:C/I:C/A:C

    v3: / HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

    Links to Exploits(if available)

  • Available for Amazon Prime