CVE-2021-22555 — Linux Kernel Heap Out-of-Bounds Write Vulnerability
CVE-2021-22555: Linux Kernel Heap Out-of-Bounds Write Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Linux |
| Product | Kernel |
| Date added | 2025-10-06 |
| Due date | 2025-10-27 |
| Ransomware campaign use | Unknown |
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22555
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog