PT-2025-27732 · Canonical+6 · Openvswitch+7
Published
2025-05-23
·
Updated
2026-04-20
·
CVE-2025-38146
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 versions prior to 5.15.0-121-generic #131-Ubuntu
Description:
A vulnerability in the Linux kernel has been resolved, specifically in the openvswitch module. The issue occurs when an unexpected MPLS packet does not end with the bottom label stack, causing a dead loop and potentially leading to a soft lockup or CPU stuck. This happens when the label count value wraps around due to many stacks. The vulnerability is related to an array-index-out-of-bounds error in the
flow.c file.Recommendations:
For Linux kernel version 5.15.0-121-generic #131-Ubuntu and earlier, update to a newer version to resolve the issue. As a temporary workaround, consider disabling the
openvswitch module until a patch is available. Restrict access to the vulnerable flow.c file to minimize the risk of exploitation. Avoid using the key extract l3l4 function in the affected openvswitch module until the issue is resolved.Exploit
Fix
Improper Validation of Array Index
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu
Openvswitch