Use-after-free in Linux kernel - CVE-2026-98060
Published: September 28, 2026
Vulnerability identifier: #VU152389
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-2026-98060
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 locking in BPF rbtree comparison callback handling when executing a program-supplied comparison callback during an rbtree operation. A local user can release the root lock using resilient lock kfuncs during the callback to trigger a use-after-free condition.
Exploitation requires another CPU to remove and free the node referenced by the in-progress tree walk before it resumes.
Affected software
Linux kernel
How to mitigate CVE-2026-98060
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3