SB2026081297 - Improper input validation in Linux kernel infiniband core driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-68425)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper state validation in the kernel-handled RMPP receive processing in IB MAD handling when processing unsolicited active RMPP DATA responses. A remote attacker can send a specially crafted unmatched RMPP response to cause a denial of service.

The issue occurs because receive-side reassembly could begin before the full TID and source address were verified against an outstanding send.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6e1bd7f590b0ccfee07f7fe1d48b92059bd37d72
• https://git.kernel.org/stable/c/98d2d468b4faa1fdc68c0c6c238389906ee3490c
• https://git.kernel.org/stable/c/ad9c9ad3204f63a46f0f7de29687a8e512f05e29
• https://git.kernel.org/stable/c/d2e52d610b9b09694261632340b801a421e0b0c5
• https://git.kernel.org/stable/c/dfa535c94406c03d3f0c869ef3ba5528e395737c