# CVE-2022-49929: RDMA/rxe: Fix mr leak in RESPST_ERR_RNR

Status: published. Published: 2025-05-01. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

RDMA/rxe: Fix mr leak in RESPST_ERR_RNR

rxe_recheck_mr() will increase mr's ref_cnt, so we should call rxe_put(mr)
to drop mr's ref_cnt in RESPST_ERR_RNR to avoid below warning:

  WARNING: CPU: 0 PID: 4156 at drivers/infiniband/sw/rxe/rxe_pool.c:259 __rxe_cleanup+0x1df/0x240 [rdma_rxe]
...
  Call Trace:
   rxe_dereg_mr+0x4c/0x60 [rdma_rxe]
   ib_dereg_mr_user+0xa8/0x200 [ib_core]
   ib_mr_pool_destroy+0x77/0xb0 [ib_core]
   nvme_rdma_destroy_queue_ib+0x89/0x240 [nvme_rdma]
   nvme_rdma_free_queue+0x40/0x50 [nvme_rdma]
   nvme_rdma_teardown_io_queues.part.0+0xc3/0x120 [nvme_rdma]
   nvme_rdma_error_recovery_work+0x4d/0xf0 [nvme_rdma]
   process_one_work+0x582/0xa40
   ? pwq_dec_nr_in_flight+0x100/0x100
   ? rwlock_bug.part.0+0x60/0x60
   worker_thread+0x2a9/0x700
   ? process_one_work+0xa40/0xa40
   kthread+0x168/0x1a0
   ? kthread_complete_and_exit+0x20/0x20
   ret_from_fork+0x22/0x30

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 8a1a0be894da0d06bfbb496cc2dc3057fa83e103; < 50b35ad2864a9d66f802f9ce193d99bbef64e219 (affected, git); ≥ 8a1a0be894da0d06bfbb496cc2dc3057fa83e103; < b5f9a01fae42684648c2ee3cd9985f80c67ab9f7 (affected, git). Source: CNA: Linux
- Linux / Linux: 5.18 (affected); ≥ 0; < 5.18 (unaffected, semver); ≥ 6.0.8; ≤ 6.0.* (unaffected, semver); ≥ 6.1; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.16% as of 2026-11-05; percentile 5.04%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/50b35ad2864a9d66f802f9ce193d99bbef64e219 (CNA: Linux)

- https://git.kernel.org/stable/c/b5f9a01fae42684648c2ee3cd9985f80c67ab9f7 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-49929; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-49929; retrieved 2026-11-05; source updated Not reported

Revision: 24d725064311eca8bb43b67fa110685592e1e4238e0891883e3713bd2df2980c

Canonical: https://y2.dev/cve/CVE-2022-49929

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