CVE-2021-22555
HIGH7.8⚠ KEVEPSS 85.2%Linux Kernel Heap Out-of-Bounds Write Vulnerability
Published: 7/7/2021Modified: 4/28/2026Added to CISA KEV: 10/6/2025
Description
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space
Affected packages (1)
- Debian/linuxfrom 0, < 5.10.38-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |