CVE-2025-21662
5.5 · MEDIUMOverview
CVE-2025-21662 is a medium-severity vulnerability affecting linux linux_kernel. It was published on January 21, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: Fix variable not being completed when function returns
When cmd_alloc_index(), fails cmd_work_handler() needs
to complete ent->slotted before returning early.
Otherwise the task which issued the command may hang:
mlx5_core 0000:01:00.0: cmd_work_handler:877:(pid 3880418): failed to allocate command entry
INFO: task kworker/13:2:4055883 blocked for more than 120 seconds.
Not tainted 4.19.90-25.44.v2101.ky10.aarch64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/13:2 D 0 4055883 2 0x00000228
Workqueue: events mlx5e_tx_dim_work [mlx5_core]
Call trace:
__switch_to+0xe8/0x150
__schedule+0x2a8/0x9b8
schedule+0x2c/0x88
schedule_timeout+0x204/0x478
wait_for_common+0x154/0x250
wait_for_completion+0x28/0x38
cmd_exec+0x7a0/0xa00 [mlx5_core]
mlx5_cmd_exec+0x54/0x80 [mlx5_core]
mlx5_core_mod
Remediation
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linux | linux_kernel | >= 6.1.93, < 6.1.125 | Affected |
References
Frequently Asked Questions
What is CVE-2025-21662?
CVE-2025-21662 is a medium-severity vulnerability affecting linux linux_kernel. It was published on January 21, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2025-21662?
This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-21662?
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-21662?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-21662 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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