CVE-2026-46176

Advisory lineage Upstream: 0 Downstream: 23
Analyzed
Published: 28 May 2026, 09:36
Last modified:15 Jul 2026, 00:51

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.14% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

28 May 2026, 09:36
Published
Vulnerability first disclosed
15 Jul 2026, 00:51
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.14%• Percentile: 4%

Techniques & Countermeasures

  • CWE-825•Expired Pointer Dereference

    The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.

Affected Systems

  • linux•linux

    ≥ b6334d2356fc0922ed01457960f74923058a353a, < a13c2ac4d480b734342c6fbf8249fc48afd675f3 | ≥ 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < bc2cf5935b4665172235341163315905197ae91d | ≥ 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < b087913ae88256df66620f7ba0a9776716aeef7e | ≥ 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < 6fd93142dd1d09000c3750af08270f5792523fe9 | ≥ 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467, < c488df06bd552bb8b6e14fa0cfd5ad986c6e9525 | ≥ 6.6.64, < 6.6.140 | 6.11

  • linux•linux kernel

    ≥ 6.6.64, < 6.6.140 | ≥ 6.11, < 6.12.88 | ≥ 6.13, < 6.18.30 | ≥ 6.19, < 7.0.7 | 7.1:rc1 | 7.1:rc2

References (12)