CVE-2026-46176
7.8 HIGHIn the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()...
Published: 2026-05-28 · Last updated: 2026-06-10
Severity and scoring
- CVSS
- 7.8 HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-46176
- [Patch]https://git.kernel.org/stable/c/6fd93142dd1d09000c3750af08270f5792523fe9
- [Patch]https://git.kernel.org/stable/c/a13c2ac4d480b734342c6fbf8249fc48afd675f3
- [Patch]https://git.kernel.org/stable/c/b087913ae88256df66620f7ba0a9776716aeef7e
- [Patch]https://git.kernel.org/stable/c/bc2cf5935b4665172235341163315905197ae91d
- [Patch]https://git.kernel.org/stable/c/c488df06bd552bb8b6e14fa0cfd5ad986c6e9525
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