CVE-2026-53110
In the Linux kernel, the following vulnerability has been resolved: s390/bpf: Zero-extend bpf prog return values and kfunc arguments s390x ABI requires callers to zero-extend unsigned arguments and sign-extend signed arguments, and callees to zero-extend unsigned return values and sign-extend signed return values. s390 BPF JIT currently implements only sign extension. Fix this omission and implement zero extension too.
Affected versions
Linux kernel versions
6.3
and later are affected. Fixed in
6.6.141,
6.12.91,
6.18.33,
7.0.10,
7.1
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-53110?
CVE-2026-53110 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.3 onward and has been patched in 6.6.141, 6.12.91, 6.18.33 and others. CVE-2026-53110 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-53110?
Yes — CVE-2026-53110 has been patched. Fixed versions include 6.6.141, 6.12.91, 6.18.33 and others. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-53110 actively exploited?
No — CVE-2026-53110 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.