CVE-2025-21781
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
batman-adv: fix panic during interface removal
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. [sven@narfation.org: prevent entering batadv_v_elp_get_throughput without soft_iface]
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | 167422a07096a6006599067c8b55884064fa0b72 | Unavailable | None listed |
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | ce3f1545bf8fa28bd05ec113679e8e6cd23af577 | Unavailable | None listed |
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | f0a16c6c79768180333f3e41ce63f32730e3c3af | Unavailable | None listed |
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | 7eb5dd201695645af071592a50026eb780081a72 | Unavailable | None listed |
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | 072b2787321903287a126c148e8db87dd7ef96fe | Unavailable | None listed |
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | 2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7 | Unavailable | None listed |
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | 522b1596ea19e327853804da2de60aeb9c5d6f42 | Unavailable | None listed |
| c833484e5f3872a38fe232c663586069d5ad9645 | affected | git | ccb7276a6d26d6f8416e315b43b45e15ee7f29e2 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.6 | Unavailable | None listed |
| 5.4.291 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.235 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.179 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.129 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.79 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.16 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.4 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |