net/mlx5: Fix a race on command flush flow
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
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>
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.4.71 to before 5.4.185; 5.8.15 to before 5.9 | 5.4.185, 5.9 | Patch available | CNA |
| Linux | Linux | 5.9 and later | 5.4.185, 5.10.106, 5.15.29, 5.16.15, 5.17 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.71 to before 5.4.185; 5.8.15 to before 5.9 Fixed in 5.4.185, 5.9 Patch available CNA
- Linux VendorLinux Affected 5.9 and later Fixed in 5.4.185, 5.10.106, 5.15.29, 5.16.15, 5.17 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 5.4.185; 5.5 to before 5.10.106; 5.11 to before 5.15.29; 5.16 to before 5.16.15 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.4.185; 5.5 to before 5.10.106; 5.11 to before 5.15.29; 5.16 to before 5.16.15 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.185, 5.9
- Fix · CNA Linux (Linux) Fixed in 5.4.185, 5.10.106, 5.15.29, 5.16.15, 5.17
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2022-48858
- 2026-10-03 Alias added: GHSA-8hqr-2pq7-7gv3
References
Patch 5
- https://git.kernel.org/stable/c/1a4017926eeea56c7540cc41b42106746ee8a0ee
- https://git.kernel.org/stable/c/f3331bc17449f15832c31823f27573f4c0e13e5f
- https://git.kernel.org/stable/c/7c519f769f555ff7d9d4ccba3497bbb589df360a
- https://git.kernel.org/stable/c/0401bfb27a91d7bdd74b1635c1aae57cbb128da6
- https://git.kernel.org/stable/c/063bd355595428750803d8736a9bb7c8db67d42d
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-48858 · CVE Program
- CVE-2022-48858 · NVD
- FIRST EPSS
- GHSA-8hqr-2pq7-7gv3 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-48858 · Red Hat security data · CC BY 4.0
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