PT-2025-13213 · Linux+4 · Linux Kernel+4
Published
2025-02-28
·
Updated
2025-06-16
·
CVE-2025-21876
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 6.14.0-rc3
Description
A vulnerability in the Linux kernel has been resolved, related to suspicious RCU usage in the
iommu/vt-d component. The issue was caused by a commit that moved the call to enable drhd fault handling() to a code path that does not hold any lock while traversing the drhd list. This fix ensures that the dmar global lock lock is held when traversing the drhd list. Without this fix, a warning is triggered, indicating suspicious RCU usage. The estimated number of potentially affected devices worldwide is not available.Recommendations
For Linux kernel versions prior to 6.14.0-rc3, update to a version that includes the fix for the suspicious RCU usage issue. As a temporary workaround, consider restricting access to the
iommu/vt-d component to minimize the risk of exploitation. Avoid using the enable drhd fault handling() function until the issue is resolved.Exploit
Fix
Improper Locking
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linuxmint
Linux Kernel
Suse
Ubuntu