CVE-2026-53110

Description

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.

References

• https://git.kernel.org/stable/c/202e42e4aa890172366354b233c42c73107a3f59
• https://git.kernel.org/stable/c/366b0e05ee24f5ba62bdc7ec1346038258b9a797
• https://git.kernel.org/stable/c/44c4f999b03f55debb1a0c5ab5c1796895a1adf8
• https://git.kernel.org/stable/c/834918a77be51419383bf1dda9f02b81ecf26b34
• https://git.kernel.org/stable/c/edc90a12073b9a530064a99945c183dde120cb99