CVE-2021-22555β€”Linux Kernel Heap Out-of-Bounds Write Vulnerability

PUBLISHEDvulnerability record
2025-10-06 Β· last modified October 6, 2025

Metadata

CVE ID:
CVE-2021-22555
Project:
Linux
Product:
Kernel
Date Added:
2025-10-06
Due Date:
2025-10-27
Last Updated:
October 6, 2025

Vulnerability Name

Linux Kernel Heap Out-of-Bounds Write Vulnerability

Description

Linux Kernel contains a heap out-of-bounds write vulnerability that could allow an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:
Unknown

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

  • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21
  • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d
  • https://security.netapp.com/advisory/ntap-20210805-0010/
  • https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
  • https://nvd.nist.gov/vuln/detail/CVE-2021-22555

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