PT-2025-13819 · Linux+6 · Linux Kernel+6
Published
2025-03-19
·
Updated
2026-01-20
·
CVE-2025-21893
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free (UAF) issue has been identified in the Linux kernel, specifically in the
key put() function. This issue arises when the reference count of a key is reduced to 0, allowing the garbage collector thread to destroy it at any time. However, the code attempts to access the key after its deadline, which is not permitted. The problem is resolved by introducing a flag to indicate when a key can be garbage collected, rather than relying on the key's reference count.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu