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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-46176

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

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • b6334d2356fc0922ed01457960f74923058a353a to < a13c2ac4d480b734342c6fbf8249fc48afd675f3affected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to < bc2cf5935b4665172235341163315905197ae91daffected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to < b087913ae88256df66620f7ba0a9776716aeef7eaffected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to < 6fd93142dd1d09000c3750af08270f5792523fe9affected
  • 5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 to < c488df06bd552bb8b6e14fa0cfd5ad986c6e9525affected
  • 6.6.64 to < 6.6.140affected

Linux Linux

Default version status: affected

  • 6.11affected
  • 0 to < 6.11unaffected
  • 6.6.140 to ≤ 6.6.*unaffected
  • 6.12.88 to ≤ 6.12.*unaffected
  • 6.18.30 to ≤ 6.18.*unaffected
  • 7.0.7 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References