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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-21781 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix panic during interface removal Reference counting is used to ensure that batadv_hardif_neigh_node and batadv_hard_iface are not freed before/during batadv_v_elp_throughput_metric_update work is finished. But there isn't a guarantee that the hard if will remain associated with a soft interface up until the work is finished. This fixes a crash triggered by reboot that looks like this: Call trace: batadv_v_mesh_free+0xd0/0x4dc [batman_adv] batadv_v_elp_throughput_metric_update+0x1c/0xa4 process_one_work+0x178/0x398 worker_thread+0x2e8/0x4d0 kthread+0xd8/0xdc ret_from_fork+0x10/0x20 (the batadv_v_mesh_free call is misleading, and does not actually happen) I was able to make the issue happen more reliably by changing hardif_neigh->bat_v.metric_work work to be delayed work. This allowed me to track down and confirm the fix. [[email protected]: prevent entering batadv_v_elp_get_throughput without soft_iface]


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/072b2787321903287a126c148e8db87dd7ef96fe kernel.org Patch 
https://git.kernel.org/stable/c/167422a07096a6006599067c8b55884064fa0b72 kernel.org Patch 
https://git.kernel.org/stable/c/2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7 kernel.org Patch 
https://git.kernel.org/stable/c/522b1596ea19e327853804da2de60aeb9c5d6f42 kernel.org Patch 
https://git.kernel.org/stable/c/7eb5dd201695645af071592a50026eb780081a72 kernel.org Patch 
https://git.kernel.org/stable/c/ccb7276a6d26d6f8416e315b43b45e15ee7f29e2 kernel.org Patch 
https://git.kernel.org/stable/c/ce3f1545bf8fa28bd05ec113679e8e6cd23af577 kernel.org Patch 
https://git.kernel.org/stable/c/f0a16c6c79768180333f3e41ce63f32730e3c3af kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html CVE
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html CVE

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-21781
NVD Published Date:
02/26/2025
NVD Last Modified:
11/03/2025
Source:
kernel.org