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Review reviewHigh

CVE-2022-50726

Linux

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix possible use-after-free in async command interface mlx5_cmd_cleanup_async_ctx should return only after all its callback handlers were completed. Before this patch, the below race between mlx5_cmd_cleanup_async_ctx and mlx5_cmd_exec_cb_handler was possible and lead to a use-after-free: 1. mlx5_cmd_cleanup_async_ctx is called while num_inflight is 2 (i.e. elevated by 1, a single inflight callback). 2. mlx5_cmd_cleanup_async_ctx decreases num_inflight to 1. 3. mlx5_cmd_exec_cb_handler is called, decreases num_inf...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.12.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix possible use-after-free in async command interface mlx5_cmd_cleanup_async_ctx should return only after all its callback handlers were completed. Before this patch, the below race between mlx5_cmd_cleanup_async_ctx and mlx5_cmd_exec_cb_handler was possible and lead to a use-after-free: 1. mlx5_cmd_cleanup_async_ctx is called while num_inflight is 2 (i.e. elevated by 1, a single inflight callback). 2. mlx5_cmd_cleanup_async_ctx decreases num_inflight to 1. 3. mlx5_cmd_exec_cb_handler is called, decreases num_inf...

Affected product and versions

Product
Linux
Affected versions
>= e355477ed9e4f401e3931043df97325d38552d54 < 69dd3ad406c49aa69ce4852c15231ac56af8caf9, >= e355477ed9e4f401e3931043df97325d38552d54 < bbcc06933f35651294ea1e963757502312c2171f, >= e355477ed9e4f401e3931043df97325d38552d54 < ab3de780c176bb91995c6166a576b370d9726e17, >= e355477ed9e4f401e3931043df97325d38552d54 < 0aa3ee1e4e5c9ed5dda11249450d609c3072c54e, >= e355477ed9e4f401e3931043df97325d38552d54 < bacd22df95147ed673bec4692ab2d4d585935241, >= 5.1
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available