SB20260824107 - Out-of-bounds read in Linux kernel core

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-74665)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/33f2b2eb33d666ecac68031e0f31424fb70528db
• https://git.kernel.org/stable/c/5f30f9c302cea1f2ebf97abe574c1826544223d7
• https://git.kernel.org/stable/c/72468efcc089782fa047afddd10856b11a14ef5b
• https://git.kernel.org/stable/c/ea1ccd6d1c6370868e3b032a3fc575b9c397f2e1