CVE-2026-46176RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-825
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b6334d2356fc0922ed01457960f74923058a353a before a13c2ac4d480b734342c6fbf8249fc48afd675f3; from 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 before bc2cf5935b4665172235341163315905197ae91d; from 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 before b087913ae88256df66620f7ba0a9776716aeef7e; 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 builds before 6fd93142dd1d09000c3750af08270f5792523fe9; from 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 before c488df06bd552bb8b6e14fa0cfd5ad986c6e9525; from 6.6.64 before 6.6.140 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:6.12.0-211.29.1.el10_2 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:6.12.0-55.84.1.el10_0 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:5.14.0-570.125.1.el9_6 not affected | CISA ADP |
linux linux_kernel linux:linux_kernel | from 6.6.64 before 6.6.140; from 6.11 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 7.1; 7.1 | NVD |
References
- https://git.kernel.org/stable/c/a13c2ac4d480b734342c6fbf8249fc48afd675f3patch
- https://git.kernel.org/stable/c/bc2cf5935b4665172235341163315905197ae91dpatch
- https://git.kernel.org/stable/c/b087913ae88256df66620f7ba0a9776716aeef7epatch
- https://git.kernel.org/stable/c/6fd93142dd1d09000c3750af08270f5792523fe9patch
- https://git.kernel.org/stable/c/c488df06bd552bb8b6e14fa0cfd5ad986c6e9525patch
- https://access.redhat.com/errata/RHSA-2026:30848
- https://access.redhat.com/errata/RHSA-2026:33215
- https://access.redhat.com/errata/RHSA-2026:33685
- https://access.redhat.com/errata/RHSA-2026:34094
- https://access.redhat.com/security/cve/CVE-2026-46176
- https://bugzilla.redhat.com/show_bug.cgi?id=2482594
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46176.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.