CVE-2021-22555 — Linux Kernel Heap Out-of-Bounds Write Vulnerability
2025-10-06 • CISA Known Exploited Vulnerability
[event] 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.
> AFFECTED SOFTWARE
| Field | Value |
|---|---|
| Vendor | Linux |
| Product | Kernel |
| CWE | CWE-787 |
| CVE ID | CVE-2021-22555 |
| Date Added | 2025-10-06 |
| Due Date | 2025-10-27 |
| Ransomware Campaign | Unknown |
> MITIGATION
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 2025-10-27
> REFERENCES
- [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/ne...
- [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/ne...
- [3] https://security.netapp.com/advisory/ntap-20210805-0010/
- [4] https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3...
- [5] https://nvd.nist.gov/vuln/detail/CVE-2021-22555