{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47482","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-22T06:20:56.200Z","datePublished":"2024-05-22T08:19:34.174Z","dateUpdated":"2025-05-04T07:12:02.779Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:12:02.779Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: batman-adv: fix error handling\n\nSyzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem was\nin wrong error handling in batadv_mesh_init().\n\nBefore this patch batadv_mesh_init() was calling batadv_mesh_free() in case\nof any batadv_*_init() calls failure. This approach may work well, when\nthere is some kind of indicator, which can tell which parts of batadv are\ninitialized; but there isn't any.\n\nAll written above lead to cleaning up uninitialized fields. Even if we hide\nODEBUG warning by initializing bat_priv->nc.work, syzbot was able to hit\nGPF in batadv_nc_purge_paths(), because hash pointer in still NULL. [1]\n\nTo fix these bugs we can unwind batadv_*_init() calls one by one.\nIt is good approach for 2 reasons: 1) It fixes bugs on error handling\npath 2) It improves the performance, since we won't call unneeded\nbatadv_*_free() functions.\n\nSo, this patch makes all batadv_*_init() clean up all allocated memory\nbefore returning with an error to no call correspoing batadv_*_free()\nand open-codes batadv_mesh_free() with proper order to avoid touching\nuninitialized fields."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bridge_loop_avoidance.c","net/batman-adv/main.c","net/batman-adv/network-coding.c","net/batman-adv/translation-table.c"],"versions":[{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"0c6b199f09be489c48622537a550787fc80aea73","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"e50f957652190b5a88a8ebce7e5ab14ebd0d3f00","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"fbf150b16a3635634b7dfb7f229d8fcd643c6c51","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"6422e8471890273994fe8cc6d452b0dcd2c9483e","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"b0a2cd38553c77928ef1646ed1518486b1e70ae8","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"a8f7359259dd5923adc6129284fdad12fc5db347","status":"affected","versionType":"git"},{"version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","lessThan":"6f68cd634856f8ca93bafd623ba5357e0f648c68","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/bridge_loop_avoidance.c","net/batman-adv/main.c","net/batman-adv/network-coding.c","net/batman-adv/translation-table.c"],"versions":[{"version":"2.6.38","status":"affected"},{"version":"0","lessThan":"2.6.38","status":"unaffected","versionType":"semver"},{"version":"4.4.293","lessThanOrEqual":"4.4.*","status":"unaffected","versionType":"semver"},{"version":"4.9.289","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.254","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.215","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.157","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.77","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.14.16","lessThanOrEqual":"5.14.*","status":"unaffected","versionType":"semver"},{"version":"5.15","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":"2.6.38","versionEndExcluding":"4.4.293"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"4.9.289"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"4.14.254"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"4.19.215"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.4.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.10.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.14.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/0c6b199f09be489c48622537a550787fc80aea73"},{"url":"https://git.kernel.org/stable/c/07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20"},{"url":"https://git.kernel.org/stable/c/e50f957652190b5a88a8ebce7e5ab14ebd0d3f00"},{"url":"https://git.kernel.org/stable/c/fbf150b16a3635634b7dfb7f229d8fcd643c6c51"},{"url":"https://git.kernel.org/stable/c/6422e8471890273994fe8cc6d452b0dcd2c9483e"},{"url":"https://git.kernel.org/stable/c/b0a2cd38553c77928ef1646ed1518486b1e70ae8"},{"url":"https://git.kernel.org/stable/c/a8f7359259dd5923adc6129284fdad12fc5db347"},{"url":"https://git.kernel.org/stable/c/6f68cd634856f8ca93bafd623ba5357e0f648c68"}],"title":"net: batman-adv: fix error handling","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.3,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2021-47482","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical 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