CVE-2022-48858
net/mlx5: Fix a race on command flush flow
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix a race on command flush flow Fix a refcount use after free warning due to a race on command entry. Such race occurs when one of the commands releases its last refcount and frees its index and entry while another process running command flush flow takes refcount to this command entry. The process which handles commands flush may see this command as needed to be flushed if the other process released its refcount but didn't release the index yet. Fix it by adding the needed spin lock. It fixes the following warning trace: refcount_t: addition on 0; use-after-free. WARNING: CPU: 11 PID: 540311 at lib/refcount.c:25 refcount_warn_saturate+0x80/0xe0 ... RIP: 0010:refcount_warn_saturate+0x80/0xe0 ... Call Trace: <TASK> mlx5_cmd_trigger_completions+0x293/0x340 [mlx5_core] mlx5_cmd_flush+0x3a/0xf0 [mlx5_core] enter_error_state+0x44/0x80 [mlx5_core] mlx5_fw_fatal_reporter_err_work+0x37/0xe0 [mlx5_core] process_one_work+0x1be/0x390 worker_thread+0x4d/0x3d0 ? rescuer_thread+0x350/0x350 kthread+0x141/0x160 ? set_kthread_struct+0x40/0x40 ret_from_fork+0x1f/0x30 </TASK>
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Weakness
Affected products
- affected 073fff8102062cd675170ceb54d90da22fe7e668 – < 1a4017926eeea56c7540cc41b42106746ee8a0ee
- affected 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 – < f3331bc17449f15832c31823f27573f4c0e13e5f
- affected 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 – < 7c519f769f555ff7d9d4ccba3497bbb589df360a
- affected 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 – < 0401bfb27a91d7bdd74b1635c1aae57cbb128da6
- affected 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 – < 063bd355595428750803d8736a9bb7c8db67d42d
- affected da87ea137373689dec9d3fafa34a57787320a4b3
- affected 5.4.71 – < 5.4.185
- affected 5.8.15 – < 5.9
- affected 5.9
- unaffected < 5.9
- unaffected 5.4.185 – ≤ 5.4.*
- unaffected 5.10.106 – ≤ 5.10.*
- unaffected 5.15.29 – ≤ 5.15.*
- unaffected 5.16.15 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (5)
- https://git.kernel.org/stable/c/1a4017926eeea56c7540cc41b42106746ee8a0ee (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f3331bc17449f15832c31823f27573f4c0e13e5f (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/7c519f769f555ff7d9d4ccba3497bbb589df360a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0401bfb27a91d7bdd74b1635c1aae57cbb128da6 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/063bd355595428750803d8736a9bb7c8db67d42d (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48858)Record last updated .