Use-after-free in Linux kernel - CVE-2026-64265
Published: July 27, 2026
Vulnerability identifier: #VU139728
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64265
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information or cause memory corruption.
The vulnerability exists due to a use-after-free in fuse_read_interrupt and FUSE request interrupt list handling when processing interrupted requests that are resent and later removed after a fatal signal. A local user can trigger request requeueing and request removal to disclose sensitive information or cause memory corruption.
Exploitation requires a previously interrupted request to remain linked on the interrupts list and a subsequent fatal signal before the interrupt list is processed.
Affected software
Linux kernel
How to mitigate CVE-2026-64265
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3