SB20261022317 - Use-after-free in Linux kernel kvm vgic

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98712)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to potentially cause a denial of service through invalid kernel memory access.

The vulnerability exists due to a use-after-free in the Linux kernel arm64 KVM virtual interrupt controller when an interrupt referenced by last_lr_irq is reclaimed during concurrent local peripheral interrupt (LPI) unmapping. A local user can trigger interrupt handling that races with LPI unmapping to potentially cause access to a freed interrupt object and a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/19bc5d79ece613f242b5ec03921a3b465321bfed
• https://git.kernel.org/stable/c/8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c