Out-of-bounds read in Linux kernel - CVE-2026-74665
Published: August 24, 2026
Vulnerability identifier: #VU144759
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-2026-74665
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 bpf_prog_run_generic_xdp() when processing generic XDP fragment adjustments on non-linear sk_buff data. A local user can trigger crafted packet handling to disclose sensitive information.
In the reproduced UDP receive path, copied data included fragment metadata and a kernel pointer, and packet payload data was displaced and truncated.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74665
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