Tracker / CVE-2026-31430
CVE-2026-31430
High 7.1
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 extension because the first byte of the extension is read before checking its length. Fix it. The bug can be triggered by an unprivileged user by submitting a specially crafted certificate to the kernel through the keyrings(7) API. Leo has demonstrated this with a proof-of-concept program responsibly disclosed off-list.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 6.13 → 6.18.23 |
| linux | linux_kernel · 6.19 → 6.19.13 |
| linux | linux_kernel · 6.4 → 6.6.135 |
| linux | linux_kernel · 6.7 → 6.12.82 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.