CVE-2026-46176
HIGHCVSS v3.1: 7.8 · EPSS: 0.0001 (2.3 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 7.8 v3.1 · NVD
- EPSS
- 0.0001 (2.3 percentile) · FIRST.org
- CISA KEV
- No
- Attack conditions (CVSS vector)
- No user interaction · Source: NVD Vector
- Affected vendors
- linux
- Published
- 2026-05-28 · Modified: 2026-06-10
- References
- Jump to references (5)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Reference https://git.kernel.org/stable/c/6fd93142dd1d09000c3750af08270f5792523fe9
- Reference https://git.kernel.org/stable/c/a13c2ac4d480b734342c6fbf8249fc48afd675f3
- Reference https://git.kernel.org/stable/c/b087913ae88256df66620f7ba0a9776716aeef7e
- Reference https://git.kernel.org/stable/c/bc2cf5935b4665172235341163315905197ae91d
- Reference https://git.kernel.org/stable/c/c488df06bd552bb8b6e14fa0cfd5ad986c6e9525