Use-after-free in Linux kernel - CVE-2026-93260
Published: September 25, 2026
Vulnerability identifier: #VU152143
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93260
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to improper error handling in xive_smp_probe() when handling a failed XIVE IPI initialization. A local user can cause xive_setup_cpu_ipi() to dereference the freed global xive_ipis array to trigger a use-after-free condition.
The initialization failure may occur when irq_domain_alloc_irqs() fails.
Affected software
Linux kernel
How to mitigate CVE-2026-93260
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3