Out-of-bounds read in Linux kernel - CVE-2026-64299
Published: July 27, 2026
Vulnerability identifier: #VU139694
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64299
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in regex_match_glob() glob matching in the tracing event filter subsystem when processing non-NUL-terminated string event fields. A local user can supply a crafted glob filter against such fields to disclose sensitive information.
One reported path reaches the issue from the xfs_lookup tracepoint, and the affected string fields may be dynamic char arrays copied without a trailing NUL byte.
Affected software
Linux kernel
How to mitigate CVE-2026-64299
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/0a6070839b1ef276d5b05bedfb787743e140fb17
- https://git.kernel.org/stable/c/265f3a690f6c7d69ef7d2ca50b04b4853a211df3
- https://git.kernel.org/stable/c/2dad64a97e1df47f5d9ccb17fa319aa348617226
- https://git.kernel.org/stable/c/35ae19764eabfe9c29029d3b5713c86e6855acdf
- https://git.kernel.org/stable/c/56d4c9ab84714eebb285a2fee68aaedf81e3ef15
- https://git.kernel.org/stable/c/e5d5f3bd053a5f14787526c9f0f55ef900d43ac6
- https://git.kernel.org/stable/c/ebb55902856973906c8bb339a3a34824ed4a5086
- https://git.kernel.org/stable/c/ee5b8888d3248618251fb69a2fad92afcb81557e