Vulnerability in Linux
CVE-2026-23406
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix side-effect bug in match_char() macro usage The match_char() macro evaluates its character parameter multiple times when traversing differential encoding c…
EPSS: 0.000 (0.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions 074c1cd798cb0b481d7eaa749b64aa416563c053, 4.17, 0
References
- git.kernel.org/stable/c/c7dc56d8b37eda1396feeec3ab1c7ecee5eae31b
- git.kernel.org/stable/c/f16f2e5936c0f5f0d11fdf10d2be3e47e7108e42
- git.kernel.org/stable/c/1fc94f16098213d01e56c97feed9b3ecf0147a37
- git.kernel.org/stable/c/5a184f7cbdeaad17e16dedf3c17d0cd622edfed8
- git.kernel.org/stable/c/b73c1dff8a9d7eeaebabf8097a5b2de192f40913
- git.kernel.org/stable/c/0510d1ba0976f97f521feb2b75b0572ea5df3ceb
- git.kernel.org/stable/c/383b7270faf42564f133134c2fc3c24bbae52615
- git.kernel.org/stable/c/8756b68edae37ff546c02091989a4ceab3f20abd
Frequently asked questions
- What is CVE-2026-23406?
- CVE-2026-23406 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-04-01.
- How severe is CVE-2026-23406?
- High severity. CVSS v3 base score is 7.8 out of 10.