Description
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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= b6334d2356fc0922ed01457960f74923058a353a, < a13c2ac4d480b734342c6fbf8249fc48afd675f3; >= 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < bc2cf5935b4665172235341163315905197ae91d; >= 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < b087913ae88256df66620f7ba0a9776716aeef7e; >= 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < 6fd93142dd1d09000c3750af08270f5792523fe9; >= 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < c488df06bd552bb8b6e14fa0cfd5ad986c6e9525; >= 6.6.64, < 6.6.140 |
| Linux | Linux | 6.11 |
| 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 7 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
References
- https://git.kernel.org/stable/c/6fd93142dd1d09000c3750af08270f5792523fe9Patch
- https://git.kernel.org/stable/c/a13c2ac4d480b734342c6fbf8249fc48afd675f3Patch
- https://git.kernel.org/stable/c/b087913ae88256df66620f7ba0a9776716aeef7ePatch
- https://git.kernel.org/stable/c/bc2cf5935b4665172235341163315905197ae91dPatch
- 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
Timeline
- Published
- May 28, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified