PT-2026-44299 · Linux · Linux Kernel

Published 2026-05-28 · Updated 2026-06-15 · CVE-2026-46176

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An error path fall-through exists in the mlx5 ib dev res srq init() function. When the function allocates two Send Receive Queues (SRQs), s0 and s1, a failure in ib create srq() for s1 causes the error branch to destroy s0 but continue execution, unconditionally assigning the freed s0 and the error pointer s1 to devr->s0 and devr->s1. This results in the lock-free fast path treating the error pointer as initialized, users in mlx5 ib create qp() dereferencing the freed SRQ or error pointer via to msrq(devr->s0)->msrq.srqn, and mlx5 ib dev res cleanup() dereferencing the error pointer and double-freeing s0 during teardown.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-46176

OPENSUSE-SU-2026:10954-1

SUSE-SU-2026:22108-1

Affected Products

Linux Kernel

References · 477

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-46176 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10954-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-46176 · Security Note
• https://git.kernel.org/stable/c/6fd93142dd1d09000c3750af08270f5792523fe9 · Patch
• https://git.kernel.org/stable/c/a13c2ac4d480b734342c6fbf8249fc48afd675f3 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-46176 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46176 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-46176 · Vendor Advisory
• https://git.kernel.org/stable/c/b087913ae88256df66620f7ba0a9776716aeef7e · Patch
• https://git.kernel.org/stable/c/c488df06bd552bb8b6e14fa0cfd5ad986c6e9525 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-46176 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22108-1 · Vendor Advisory
• https://git.kernel.org/stable/c/bc2cf5935b4665172235341163315905197ae91d · Patch
• https://cve.org/CVERecord?id=CVE-2026-46176 · Security Note
• https://bugzilla.suse.com/1264091 · Note