PT-2025-8868 · Linux+11 · Linux Kernel+11
Michal Luczaj
·
Published
2025-01-28
·
Updated
2026-01-30
·
CVE-2025-21756
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 issue has been identified in the Linux kernel, specifically in the vsock subsystem. This issue arises when a socket is unbound during a transport reassignment, leading to a potential use-after-free scenario. The problem occurs due to the incorrect handling of socket bindings, both explicit and implicit, during the connect() and bind() operations. Technical details include the involvement of functions such as
vsock create(), vsock insert unbound(), vsock remove bound(), and vsock bind(). The issue can lead to a slab-use-after-free error, as reported by KASAN.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
LPE
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Debian
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu