PT-2025-22183 · Linux+6 · Linux Kernel+6

Published

2025-04-24

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Updated

2026-04-20

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CVE-2025-37921

CVSS v3.1

7.8

High

VectorAV: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 vulnerability in the Linux kernel has been resolved, related to the deletion of a default FDB entry in 'vnifilter' mode when a VNI is deleted from a VXLAN device. This issue results in a warning being generated due to the lack of a hash lock during the deletion process. The vulnerability can be reproduced by creating a VXLAN device, adding a VNI, and then deleting it. The fix involves acquiring the hash lock before deletion and releasing it afterwards.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

BDU:2025-11830
CVE-2025-37921
DLA-4271-1
DSA-5925-1
ECHO-45C2-42B9-C2EA
MGASA-2025-0182
MGASA-2025-0183
OESA-2025-1625
OESA-2025-1629
SUSE-SU-2025:02249-1
SUSE-SU-2025:02254-1
SUSE-SU-2025:02307-1
SUSE-SU-2025:02333-1
SUSE-SU-2025:02335-1
SUSE-SU-2025:02538-1
SUSE-SU-2025:02923-1
SUSE-SU-2025:20475-1
SUSE-SU-2025:20483-1
SUSE-SU-2025:20493-1
SUSE-SU-2025:20498-1
SUSE-SU-2025_02249-1
SUSE-SU-2025_02254-1
SUSE-SU-2025_02307-1
SUSE-SU-2025_02333-1
SUSE-SU-2025_02335-1
SUSE-SU-2025_02538-1
USN-7649-1
USN-7649-2
USN-7650-1
USN-7665-1
USN-7665-2
USN-7721-1
USN-8028-1
USN-8028-2
USN-8028-3
USN-8028-4
USN-8028-5
USN-8028-6
USN-8028-7
USN-8028-8
USN-8031-1
USN-8031-2
USN-8031-3
USN-8052-1
USN-8052-2
USN-8074-1
USN-8074-2
USN-8126-1

Affected Products

Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu