Out-of-bounds Read in Linux
CVE-2026-31430
In the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extensio…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (2.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Linux — versions 30eae2b037af54b24109dcaea21db46f6285c69b, 6.4, 0
- Linux Linux_kernel — versions 7.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-31430?
- CVE-2026-31430 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-04-20.
- How severe is CVE-2026-31430?
- High severity. CVSS v3 base score is 7.1 out of 10.