Use-after-free in Linux kernel - CVE-2026-98249
Published: October 7, 2026
Vulnerability identifier: #VU153769
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98249
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in swsusp_arch_suspend_exit() when restoring hypervisor stub vectors during hibernation resume without supplying the required hypervisor call arguments. A local user can trigger a hibernation resume that leaves EL2 referencing freed vector memory to cause a denial of service.
The reported hang occurs with CONFIG_PAGE_POISONING=y and page_poison=on.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98249
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/60a3c319f1127c4d247d4ed235c5d65376d5e745
- https://git.kernel.org/stable/c/6646418d1032cac25110526161f60d255ed08397
- https://git.kernel.org/stable/c/909e92423db7299e0206232051aa21fe129f65d0
- https://git.kernel.org/stable/c/955d86e5f3b95b731991fdb84966c50b16314629
- https://git.kernel.org/stable/c/d3f8f773312af69eaf4dda106d76d6d42e4362e5
- https://git.kernel.org/stable/c/e80ea8118a073a30ebe7a31bd78938c2b1751acc