Riskcovery

CVE-2026-46176

RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()

State
Published
Severity
7.8 High
Published
May 28, 2026
Updated
Oct 19, 2026
Reserved
May 13, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
3.17.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat-SADP

Weaknesses

  • CWE-825 Expired Pointer Dereference

Affected Products

ProductVersions
LinuxLinux
  • b6334d2356fc0922ed01457960f74923058a353a to before a13c2ac4d480b734342c6fbf8249fc48afd675f3Affected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to before bc2cf5935b4665172235341163315905197ae91dAffected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to before b087913ae88256df66620f7ba0a9776716aeef7eAffected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to before 6fd93142dd1d09000c3750af08270f5792523fe9Affected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to before c488df06bd552bb8b6e14fa0cfd5ad986c6e9525Affected
  • 6.6.64 to before 6.6.140Affected
LinuxLinux
  • 6.11Affected
  • before 6.11Not affected
  • 6.6.140 through 6.6.*Not affected
  • 6.12.88 through 6.12.*Not affected
  • 6.18.30 through 6.18.*Not affected
  • 7.0.7 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.