Advisory Published
Updated

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

First published: Thu May 01 2025(Updated: )

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

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Kernel

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Frequently Asked Questions

  • What is the severity of CVE-2022-49929?

    CVE-2022-49929 is classified as a medium-severity vulnerability in the Linux kernel.

  • How do I fix CVE-2022-49929?

    To fix CVE-2022-49929, update your Linux kernel to the latest patched version provided by your distribution.

  • What does CVE-2022-49929 affect?

    CVE-2022-49929 affects the RDMA/rxe component of the Linux kernel.

  • What are the potential consequences of CVE-2022-49929?

    The potential consequences of CVE-2022-49929 include possible memory reference leaks which could lead to system instability.

  • When was CVE-2022-49929 reported?

    CVE-2022-49929 was reported as a vulnerability in the Linux kernel in late 2022.

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