CVE-2026-99142 (CVSS 7.1)

Description

In the Linux kernel, the following vulnerability has been resolved: tracing: Check operator stack capacity before pushing predicate_parse() uses the first operator stack entry before processing any opening parentheses. A push then increments top before writing. The existing check still permits that write when top already points to the last allocated entry, which can access beyond the operator stack. Reject the push when top reaches the last allocated entry.

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CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS — Exploit Prediction

0.0014

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/75e894f92417390f0ef44fd350f2d3634c784876 https://git.kernel.org/stable/c/a866a8a753922cdf7710b8eb3f686dc0efc06505 https://git.kernel.org/stable/c/c43c41ec62ca54ae145aa4912c6692a26d625734 https://git.kernel.org/stable/c/c47a7b11bcb3d45e29723afcf6336866476b1d08 https://git.kernel.org/stable/c/d6f0006f194db49c54117ae22146421da5a2ca59

Frequently Asked Questions

What is CVE-2026-99142? +

In the Linux kernel, the following vulnerability has been resolved: tracing: Check operator stack capacity before pushing predicate_parse() uses the first operator stack entry before processing any opening parentheses. A push then increments top before writing. The existing check still permits that write when top already points to the last allocated entry, which can access beyond the operator stack. Reject the push when top reaches the last allocated entry. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-99142? +

CVE-2026-99142 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0014, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-99142? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-99142