Out-of-bounds read in Linux kernel - CVE-2026-74603
Published: August 24, 2026
Vulnerability identifier: #VU144965
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-2026-74603
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 the ptp ocp devlink board id reporting logic when processing a non-NUL-terminated EEPROM board ID field. A local user can trigger reporting of the board ID to disclose sensitive information.
The issue occurs because the EEPROM board ID is a fixed 13-byte field that is not guaranteed to contain a NUL terminator.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74603
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1
External References
- https://git.kernel.org/stable/c/3d965811be78473654e6e8cc8e4fb7b6b87aa6c1
- https://git.kernel.org/stable/c/5fd91dd4a143479b0575fb1f202ec1c501e71fd5
- https://git.kernel.org/stable/c/6b69f2ef10cdb018c0b127a7cab88e590bbddba4
- https://git.kernel.org/stable/c/72ef3ce80078199bfad32f98d055f44ba7cd0c3d
- https://git.kernel.org/stable/c/f8d7e5751267637190eff887c971d5b468106213
- https://git.kernel.org/stable/c/f92558bbe78d6284fedd053900f82a70f0aa8707