Out-of-bounds read in Linux kernel - CVE-2026-74694
Published: August 24, 2026
Vulnerability identifier: #VU144667
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74694
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 ncsi_send_cmd_nl() and ncsi_cmd_handler_oem() when processing a netlink request containing an NCSI packet header with a forged payload length. A local user can send a specially crafted netlink request to disclose sensitive information.
Exploitation requires a registered NCSI device.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74694
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/02226af69362758046822840fc6a497f5de33f00
- https://git.kernel.org/stable/c/3a60b5af75abe8e3494ccd074fb4ae6e601a3e55
- https://git.kernel.org/stable/c/43c7d0a6917751ea898ae584d00f24f5deac46d4
- https://git.kernel.org/stable/c/4489b4a17892750131e4bef4bc1d3d703c8fb5ba
- https://git.kernel.org/stable/c/67c72b8ef63d9d9a610546fda30b116638f39745
- https://git.kernel.org/stable/c/afa58b7384913c8773d837acdb07b035690ec5d2
- https://git.kernel.org/stable/c/b5231ad0b376b801ab8cf2962b182cc29deaedb3
- https://git.kernel.org/stable/c/e60afa01d35f8b2671b27ca93309921427144cce