Out-of-bounds read in Linux kernel - CVE-2026-74612
Published: August 24, 2026
Vulnerability identifier: #VU144957
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-2026-74612
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 to userspace.
The vulnerability exists due to an out-of-bounds read in veth_xdp_rcv_skb() when processing an skb after XDP fragment area adjustment. A local user can run an XDP program that shrinks the fragment area to disclose sensitive information to userspace.
The issue can expose skb metadata including fragment state and a kernel pointer, and was observed on the UDP receive path.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74612
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/0c3024afabb8064b141f3cedcb1ddd6ab05ad9d5
- https://git.kernel.org/stable/c/2f2a7f3f8b9f1bffc9b0488aa02b6951b2aec139
- https://git.kernel.org/stable/c/3205b0652a37255dbb7ca8f3d942c8d8aa677c21
- https://git.kernel.org/stable/c/41b96667d42b74bb4b137f1bb78b611a953c5943
- https://git.kernel.org/stable/c/cb6379feaaff11c4e1e79c26c745ffa23182768a
- https://git.kernel.org/stable/c/cdf745b7a777f87f51666e5d8f4c6fc279bcf54d