CVE-2026-99143 tracing: Keep the predicate limit separate from program capacity
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-99143?
CVE-2026-99143 is a vulnerability in Linux, published on 28 Oct 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
tracing: Keep the predicate limit separate from program capacity
predicate_parse() adds two to nr_preds to reserve the terminal TRUE and FALSE entries. It also uses that increased value as the limit for parsed predicates. If the initial count is smaller than the number actually parsed, the program can fill the allocation and subsequent accesses can go past its end.
Keep nr_preds as the predicate limit and use a separate value for the allocation size. This leaves space for both terminal entries and a zeroed entry when parsing stops at the limit.
Which versions are affected by CVE-2026-99143?
How do I fix CVE-2026-99143?
Upgrade to a fixed version.
Is CVE-2026-99143 being exploited?
There is no known exploitation of CVE-2026-99143 in the wild and no public exploit code.
Sources
Also known as AZL-111272, BELL-CVE-2026-99143, DEBIAN-CVE-2026-99143, GHSA-wrcg-q86c-34hw, UBUNTU-CVE-2026-99143.