{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21781","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-12-29T08:45:45.764Z","datePublished":"2025-02-27T02:18:24.013Z","dateUpdated":"2026-05-11T21:06:18.377Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:06:18.377Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix panic during interface removal\n\nReference counting is used to ensure that\nbatadv_hardif_neigh_node and batadv_hard_iface\nare not freed before/during\nbatadv_v_elp_throughput_metric_update work is\nfinished.\n\nBut there isn't a guarantee that the hard if will\nremain associated with a soft interface up until\nthe work is finished.\n\nThis fixes a crash triggered by reboot that looks\nlike this:\n\nCall trace:\n batadv_v_mesh_free+0xd0/0x4dc [batman_adv]\n batadv_v_elp_throughput_metric_update+0x1c/0xa4\n process_one_work+0x178/0x398\n worker_thread+0x2e8/0x4d0\n kthread+0xd8/0xdc\n ret_from_fork+0x10/0x20\n\n(the batadv_v_mesh_free call is misleading,\nand does not actually happen)\n\nI was able to make the issue happen more reliably\nby changing hardif_neigh->bat_v.metric_work work\nto be delayed work. This allowed me to track down\nand confirm the fix.\n\n[sven@narfation.org: prevent entering batadv_v_elp_get_throughput without\n soft_iface]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bat_v_elp.c"],"versions":[{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"167422a07096a6006599067c8b55884064fa0b72","status":"affected","versionType":"git"},{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"ce3f1545bf8fa28bd05ec113679e8e6cd23af577","status":"affected","versionType":"git"},{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"f0a16c6c79768180333f3e41ce63f32730e3c3af","status":"affected","versionType":"git"},{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"7eb5dd201695645af071592a50026eb780081a72","status":"affected","versionType":"git"},{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"072b2787321903287a126c148e8db87dd7ef96fe","status":"affected","versionType":"git"},{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7","status":"affected","versionType":"git"},{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"522b1596ea19e327853804da2de60aeb9c5d6f42","status":"affected","versionType":"git"},{"version":"c833484e5f3872a38fe232c663586069d5ad9645","lessThan":"ccb7276a6d26d6f8416e315b43b45e15ee7f29e2","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bat_v_elp.c"],"versions":[{"version":"4.6","status":"affected"},{"version":"0","lessThan":"4.6","status":"unaffected","versionType":"semver"},{"version":"5.4.291","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.235","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.179","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.129","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.79","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.16","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.13.4","lessThanOrEqual":"6.13.*","status":"unaffected","versionType":"semver"},{"version":"6.14","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.4.291"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.10.235"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.15.179"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.1.129"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.6.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.12.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.13.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.14"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/167422a07096a6006599067c8b55884064fa0b72"},{"url":"https://git.kernel.org/stable/c/ce3f1545bf8fa28bd05ec113679e8e6cd23af577"},{"url":"https://git.kernel.org/stable/c/f0a16c6c79768180333f3e41ce63f32730e3c3af"},{"url":"https://git.kernel.org/stable/c/7eb5dd201695645af071592a50026eb780081a72"},{"url":"https://git.kernel.org/stable/c/072b2787321903287a126c148e8db87dd7ef96fe"},{"url":"https://git.kernel.org/stable/c/2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7"},{"url":"https://git.kernel.org/stable/c/522b1596ea19e327853804da2de60aeb9c5d6f42"},{"url":"https://git.kernel.org/stable/c/ccb7276a6d26d6f8416e315b43b45e15ee7f29e2"}],"title":"batman-adv: fix panic during interface removal","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T20:59:27.625Z"}}]}}