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

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Summary

CVECVE-2026-46176
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:33 UTC
Updated2026-05-30 11:17:25 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000180000 probability, percentile 0.051640000 (date 2026-05-29)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b6334d2356fc0922ed01457960f74923058a353a a13c2ac4d480b734342c6fbf8249fc48afd675f3 git Not specified
CNA Linux Linux affected 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 bc2cf5935b4665172235341163315905197ae91d git Not specified
CNA Linux Linux affected 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 b087913ae88256df66620f7ba0a9776716aeef7e git Not specified
CNA Linux Linux affected 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 6fd93142dd1d09000c3750af08270f5792523fe9 git Not specified
CNA Linux Linux affected 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 c488df06bd552bb8b6e14fa0cfd5ad986c6e9525 git Not specified
CNA Linux Linux affected 6.6.64 6.6.140 semver Not specified
CNA Linux Linux affected 6.11 Not specified
CNA Linux Linux unaffected 6.11 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.88 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a13c2ac4d480b734342c6fbf8249fc48afd675f3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6fd93142dd1d09000c3750af08270f5792523fe9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc2cf5935b4665172235341163315905197ae91d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b087913ae88256df66620f7ba0a9776716aeef7e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c488df06bd552bb8b6e14fa0cfd5ad986c6e9525 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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