Improper input validation in Linux kernel - CVE-2026-68425

Vulnerability identifier: #VU141615

CSH Severity: Medium

CVSS v4: 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]

CVE-ID: CVE-2026-68425

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Linux kernel
openEuler
kernel
python3-perf-debuginfo
python3-perf
python2-perf-debuginfo
python2-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel-headers

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
python3-perf-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
python3-perf - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
python2-perf-debuginfo - update to 4.19.90-2608.6.0.0388
python2-perf - update to 4.19.90-2608.6.0.0388
perf-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
perf - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-tools-devel - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-tools-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-tools - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-source - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-devel - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-debugsource - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
bpftool-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
bpftool - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-headers - update to 5.10.0-331.0.0.232

• 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

• Improper input validation in Linux kernel infiniband core driver
• openEuler 22.03 LTS SP4 update for kernel
• openEuler 20.03 LTS SP4 update for kernel