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Fencer Vulns
high 7.8

CVE-2026-46176 json

RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()

published 2026-05-28 5 mo ago modified 2026-10-19 20 d ago also EUVD-2026-32803

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()

mlx5_ib_dev_res_srq_init() allocates two SRQs, s0 and s1. When ib_create_srq() fails for s1, the error branch destroys s0 but falls through and unconditionally assigns the freed s0 and the ERR_PTR s1 to devr->s0 and devr->s1.

This leads to several problems: the lock-free fast path checks "if (devr->s1) return 0;" and treats the ERR_PTR as already initialised; users in mlx5_ib_create_qp() dereference the freed SRQ or ERR_PTR via to_msrq(devr->s0)->msrq.srqn; and mlx5_ib_dev_res_cleanup() dereferences the ERR_PTR and double-frees s0 on teardown.

Fix by adding the same `goto unlock` in the s1 failure path.

Patch / fix

  • Linux Linux 6.6.140, 6.12.88, 6.18.30, 7.0.7, 7.1
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.29.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.84.1.el10_0
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.19.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.125.1.el9_6
  • linux Debian 13 6.12.88-1
  • linux Debian 14 7.0.7-1

debian advisories DEBIAN-CVE-2026-46176

  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1008.8
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1059.67
  • linux-gke Ubuntu 26.04 LTS 7.0.0-1003.4

ubuntu advisories UBUNTU-CVE-2026-46176

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kpatch-patch-6_12_0-211_16_1 RHEL 10.2 2-10.el10_2
  • kpatch-patch-6_12_0-211_49_1 RHEL 10.2 2-2.el10_2
  • kpatch-patch-5_14_0-687_10_1 RHEL 9 1-10.el9_8
  • kpatch-patch-5_14_0-687_42_1 RHEL 9 1-1.el9_8
  • kernel RHEL 10.2 6.12.0-211.29.1.el10_2
  • rv RHEL 10.2 6.12.0-211.29.1.el10_2
  • perf RHEL 10.2 6.12.0-211.29.1.el10_2
  • rtla RHEL 10.2 6.12.0-211.29.1.el10_2

red hat advisories RHSA-2026:82326RHSA-2026:81451RHSA-2026:81452RHSA-2026:34094RHSA-2026:33685RHSA-2026:33215

  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • kernel-rt Real Time Module 15 SP7 6.4.0-150700.7.59.2
  • kernel-syms-rt Real Time Module 15 SP7 6.4.0-150700.7.59.1
  • kernel-source-rt Real Time Module 15 SP7 6.4.0-150700.7.59.2
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.60.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.60.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.60.1

suse advisories SUSE-SU-2026:22433-1SUSE-SU-2026:22458-1SUSE-SU-2026:2591-1SUSE-SU-2026:2482-1SUSE-SU-2026:22108-1SUSE-SU-2026:22137-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.35.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.35.1

opensuse advisories openSUSE-SU-2026:20965-1openSUSE-SU-2026:10954-1

  • kernel AlmaLinux 10 6.12.0-211.29.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.29.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.29.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.29.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.29.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.29.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.29.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.29.1.el10_2

almalinux advisories ALSA-2026:33685ALSA-2026:30848

  • kernel Azure Linux 3.0 6.6.141.1-1

azure linux advisories AZL-88836

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-46176 updated cvss 7.0

kernel: RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()

  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.125.1.el9_6
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.19.1.el9_8, perf 5.14.0-687.19.1.el9_8, rtla 5.14.0-687.19.1.el9_8, python3-perf 5.14.0-687.19.1.el9_8, kernel-devel-matched 5.14.0-687.19.1.el9_8, kernel-64k-devel-matched 5.14.0-687.19.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.29.1.el10_2, perf 6.12.0-211.29.1.el10_2, rtla 6.12.0-211.29.1.el10_2, python3-perf 6.12.0-211.29.1.el10_2, kernel-devel-matched 6.12.0-211.29.1.el10_2, kernel-64k-devel-matched 6.12.0-211.29.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:33685
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.84.1.el10_0, perf 6.12.0-55.84.1.el10_0, rtla 6.12.0-55.84.1.el10_0, python3-perf 6.12.0-55.84.1.el10_0, kernel-devel-matched 6.12.0-55.84.1.el10_0, kernel-64k-devel-matched 6.12.0-55.84.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.125.1.el9_6, perf 5.14.0-570.125.1.el9_6, rtla 5.14.0-570.125.1.el9_6, python3-perf 5.14.0-570.125.1.el9_6, kernel-devel-matched 5.14.0-570.125.1.el9_6, kernel-64k-devel-matched 5.14.0-570.125.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.19.1.el9_8, kernel-64k 5.14.0-687.19.1.el9_8, kernel-core 5.14.0-687.19.1.el9_8, kernel-tools 5.14.0-687.19.1.el9_8, kernel-modules 5.14.0-687.19.1.el9_8, kernel-64k-core 5.14.0-687.19.1.el9_8, +29 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.29.1.el10_2, kernel-64k 6.12.0-211.29.1.el10_2, kernel-core 6.12.0-211.29.1.el10_2, kernel-tools 6.12.0-211.29.1.el10_2, kernel-modules 6.12.0-211.29.1.el10_2, kernel-64k-core 6.12.0-211.29.1.el10_2, +30 more
    fixed: vendor fix RHSA-2026:33685
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.84.1.el10_0, kernel-64k 6.12.0-55.84.1.el10_0, kernel-core 6.12.0-55.84.1.el10_0, kernel-tools 6.12.0-55.84.1.el10_0, kernel-modules 6.12.0-55.84.1.el10_0, kernel-64k-core 6.12.0-55.84.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:33215
show 13 more
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.125.1.el9_6, kernel-64k 5.14.0-570.125.1.el9_6, kernel-core 5.14.0-570.125.1.el9_6, kernel-tools 5.14.0-570.125.1.el9_6, kernel-modules 5.14.0-570.125.1.el9_6, kernel-64k-core 5.14.0-570.125.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.19.1.el9_8
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.29.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.29.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.29.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.29.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.29.1.el10_2
    fixed: vendor fix RHSA-2026:33685
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.84.1.el10_0
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.19.1.el9_8, kernel-rt-64k 5.14.0-687.19.1.el9_8, kernel-rt-core 5.14.0-687.19.1.el9_8, kernel-rt-modules 5.14.0-687.19.1.el9_8, kernel-rt-64k-core 5.14.0-687.19.1.el9_8, kernel-rt-debug-core 5.14.0-687.19.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.29.1.el10_2, kernel-rt-64k 6.12.0-211.29.1.el10_2, kernel-rt-core 6.12.0-211.29.1.el10_2, kernel-rt-modules 6.12.0-211.29.1.el10_2, kernel-rt-64k-core 6.12.0-211.29.1.el10_2, kernel-rt-debug-core 6.12.0-211.29.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:33685
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.84.1.el10_0, kernel-rt-64k 6.12.0-55.84.1.el10_0, kernel-rt-core 6.12.0-55.84.1.el10_0, kernel-rt-modules 6.12.0-55.84.1.el10_0, kernel-rt-64k-core 6.12.0-55.84.1.el10_0, kernel-rt-debug-core 6.12.0-55.84.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-64k 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-64k-core 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.19.1.el9_8, kernel-rt-core 5.14.0-687.19.1.el9_8, kernel-rt-modules 5.14.0-687.19.1.el9_8, kernel-rt-debug-core 5.14.0-687.19.1.el9_8, kernel-rt-modules-core 5.14.0-687.19.1.el9_8, kernel-rt-debug-modules 5.14.0-687.19.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.29.1.el10_2, kernel-rt-core 6.12.0-211.29.1.el10_2, kernel-rt-modules 6.12.0-211.29.1.el10_2, kernel-rt-debug-core 6.12.0-211.29.1.el10_2, kernel-rt-modules-core 6.12.0-211.29.1.el10_2, kernel-rt-debug-modules 6.12.0-211.29.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:33685
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.84.1.el10_0, kernel-rt-kvm 6.12.0-55.84.1.el10_0, kernel-rt-core 6.12.0-55.84.1.el10_0, kernel-rt-modules 6.12.0-55.84.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.84.1.el10_0, kernel-rt-debug-core 6.12.0-55.84.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-kvm 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
23 d ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness
  • CWE-825 Expired Pointer Dereference
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.