CVE Catalog

CVE-2026-72290

Low risk· EPSS 11%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

11th percentile - higher than 11% of all known CVEs

Summary

In the Linux kernel for KVM on s390, kvm_s390_gisc_register() had a GISC refcount leak on AIF enable failure. After registering GISC, if later steps failed, kvm_s390_gisc_unregister() was not called. The fix adds the missing call in the error unwind path.

Risk Assessment

GISC refcount leak could lead to resource exhaustion and system instability, especially with repeated failures.

Recommendation

Apply the Linux kernel update containing this fix to prevent reference leak.

Other vulnerabilities in Linux kernel

See all
Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix GISC refcount leak on AIF enable failure kvm_s390_gisc_register() registers the guest ISC before pinning the guest interrupt forwarding pages and allocating the AISB bit. If any of the later setup steps fails, the function unwinds the pinned pages and other local state, but does not unregister the GISC reference. Add the missing kvm_s390_gisc_unregister() to the error unwind path.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS