{ "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": "2024-08-04T05:39:59.554Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:08:44.353Z" }, "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": "c6c8fea29769", "lessThan": "0c6b199f09be", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769", "lessThan": "07533f1a673c", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769", "lessThan": "e50f95765219", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769", "lessThan": "fbf150b16a36", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769", "lessThan": "6422e8471890", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769", "lessThan": "b0a2cd38553c", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769", "lessThan": "a8f7359259dd", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769", "lessThan": "6f68cd634856", "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": "custom" }, { "version": "4.4.293", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.9.289", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.14.254", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.215", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.157", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.77", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.14.16", "lessThanOrEqual": "5.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "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-a5840b7849dd" } }, "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 Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-22T14:23:49.834451Z" } } } ], "affected": [ { "cpes": [ "cpe:2.3:a:linux:kernel:*:*:*:*:*:*:*:*" ], "vendor": "linux", "product": "kernel", "versions": [ { "status": "affected", "version": "c6c8fea29769", "lessThan": "6f68cd634856", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-544", "description": "CWE-544 Missing Standardized Error Handling Mechanism" } ] } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:15:18.900Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.554Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/0c6b199f09be489c48622537a550787fc80aea73", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e50f957652190b5a88a8ebce7e5ab14ebd0d3f00", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/fbf150b16a3635634b7dfb7f229d8fcd643c6c51", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6422e8471890273994fe8cc6d452b0dcd2c9483e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b0a2cd38553c77928ef1646ed1518486b1e70ae8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a8f7359259dd5923adc6129284fdad12fc5db347", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6f68cd634856f8ca93bafd623ba5357e0f648c68", "tags": [ "x_transferred" ] } ] } ] } }