PT-2025-13223 · Linux+2 · Linux Kernel+2
Published
2025-02-20
·
Updated
2025-06-16
·
CVE-2025-21886
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.12.0-rc7+
Description
A vulnerability in the Linux kernel has been resolved, specifically in the RDMA/mlx5 component. The issue was related to an implicit ODP hang on parent deregistration. The problem occurred because the reference count for the implicit MR parent was not properly managed, leading to a potential hang during parent deregistration. The code has been updated to properly manage the reference count.
Recommendations
For Linux kernel versions prior to 6.12.0-rc7+, update to a newer version to resolve the issue.
As a temporary workaround, consider disabling the
destroy unused implicit child mr() function until a patch is available.
Restrict access to the ib uverbs module to minimize the risk of exploitation.
Avoid using the ib dereg mr user function in the affected API endpoint until the issue is resolved.Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse