PT-2025-13224 · Linux+10 · Linux Kernel+10
Published
2025-02-15
·
Updated
2026-04-20
·
CVE-2025-21887
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
The issue is caused by a use-after-free error in the
ovl dentry update reval function. This error occurs because dput(upper) is called before ovl dentry update reval(), while upper->d flags is still accessed in ovl dentry remote(). To fix this, dput(upper) is moved after its last use. The problem was identified by KASAN, which reported a slab-use-after-free error in ovl dentry remote and ovl dentry update reval.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu