PatchTheCVECVE-2026-53110: In the Linux kernel, the following vulnerability has been resolved: s390/bpf: Zero-extend bpf prog return val
CVE-2026-53110 is a high-severity flaw (CVSS 7.8) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.8 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 98%) |
| CISA exploited list | No |
| Weakness | CWE-190 |
| Published | 2026-06-24 |
| Last modified | 2026-10-19 |
Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-53110?
linux kernel: upgrade to 6.6.141, 6.12.91, 6.18.33, 7.0.10. Exact commands for each OS are on this page.
Is CVE-2026-53110 being exploited?
CVE-2026-53110 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-53110 affect?
CVE-2026-53110 affects linux kernel. Severity is high (CVSS 7.8). 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 callee
How urgent is CVE-2026-53110?
Priority 33/100. High severity; On your watchlist
Software pages
Related CVEs
- CVE-2026-63938 CRITICAL 9.3 UPGRADE In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Check PSC request indices again
- CVE-2026-63937 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Use READ_ONCE() when reading en
- CVE-2026-63927 HIGH 7.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: Fix use after free in debug co
- CVE-2026-63925 HIGH 8.1 UPGRADE In the Linux kernel, the following vulnerability has been resolved: macsec: fix replay protection at XPN lowe
- CVE-2026-63923 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: validate body pcifunc in rv