Vulnerability Database

322,935

Total vulnerabilities in the database

CVE-2021-33200

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.

  • Published: May 27, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-33200
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.8
  • AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 7.2
  • AV:L/AC:L/Au:N/C:C/I:C/A:C

CWEs:

Software From Fixed in
linux / linux_kernel 5.4.116 5.4.123
linux / linux_kernel 5.10.33 5.10.41
linux / linux_kernel 5.11.17 5.12.8
fedoraproject / fedora 33 33.x
fedoraproject / fedora 34 34.x