{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47520", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-24T15:02:54.824Z", "datePublished": "2024-05-24T15:09:33.796Z", "dateUpdated": "2026-05-11T13:56:15.222Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:56:15.222Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: pch_can: pch_can_rx_normal: fix use after free\n\nAfter calling netif_receive_skb(skb), dereferencing skb is unsafe.\nEspecially, the can_frame cf which aliases skb memory is dereferenced\njust after the call netif_receive_skb(skb).\n\nReordering the lines solves the issue." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/can/pch_can.c" ], "versions": [ { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "bafe343a885c70dddf358379cf0b2a1c07355d8d", "status": "affected", "versionType": "git" }, { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "3a3c46e2eff0577454860a203be1a8295f4acb76", "status": "affected", "versionType": "git" }, { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "affbad02bf80380a7403885b9fe4a1587d1bb4f3", "status": "affected", "versionType": "git" }, { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa", "status": "affected", "versionType": "git" }, { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "abb4eff3dcd2e583060082a18a8dbf31f02689d4", "status": "affected", "versionType": "git" }, { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "703dde112021c93d6e89443c070e7dbd4dea612e", "status": "affected", "versionType": "git" }, { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "6c73fc931658d8cbc8a1714b326cb31eb71d16a7", "status": "affected", "versionType": "git" }, { "version": "b21d18b51b31a24d17f883b678432fbdee3d5675", "lessThan": "94cddf1e9227a171b27292509d59691819c458db", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/can/pch_can.c" ], "versions": [ { "version": "2.6.37", "status": "affected" }, { "version": "0", "lessThan": "2.6.37", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.295", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.293", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.258", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.221", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.165", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.85", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.8", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16", "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": "2.6.37", "versionEndExcluding": "4.4.295" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "4.9.293" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "4.14.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "4.19.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.4.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.10.85" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.15.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.37", "versionEndExcluding": "5.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d" }, { "url": "https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76" }, { "url": "https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3" }, { "url": "https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa" }, { "url": "https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4" }, { "url": "https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e" }, { "url": "https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7" }, { "url": "https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db" } ], "title": "can: pch_can: pch_can_rx_normal: fix use after free", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-17T18:03:24.271974Z", "id": "CVE-2021-47520", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-17T18:03:39.525Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.800Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db", "tags": [ "x_transferred" ] } ] } ] } }