SB20260406121 - Out-of-bounds read in Linux kernel netfilter

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-31407)

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

CVSSv4: 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/E:U/U:Clear

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in the sctp and ctnetlink netlink attribute handling when processing crafted netlink attributes. A remote attacker can send specially crafted netlink messages to disclose sensitive information.

The issue is caused by missing validation of user-supplied netlink attribute values before they are used by the kernel.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0fbae1e74493d5a160a70c51aeba035d8266ea7d
• https://git.kernel.org/stable/c/f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05