{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47333", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:28:16.975Z", "datePublished": "2024-05-21T14:35:43.760Z", "dateUpdated": "2025-05-04T07:08:50.065Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:08:50.065Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: alcor_pci: fix null-ptr-deref when there is no PCI bridge\n\nThere is an issue with the ASPM(optional) capability checking function.\nA device might be attached to root complex directly, in this case,\nbus->self(bridge) will be NULL, thus priv->parent_pdev is NULL.\nSince alcor_pci_init_check_aspm(priv->parent_pdev) checks the PCI link's\nASPM capability and populate parent_cap_off, which will be used later by\nalcor_pci_aspm_ctrl() to dynamically turn on/off device, what we can do\nhere is to avoid checking the capability if we are on the root complex.\nThis will make pdev_cap_off 0 and alcor_pci_aspm_ctrl() will simply\nreturn when bring called, effectively disable ASPM for the device.\n\n[ 1.246492] BUG: kernel NULL pointer dereference, address: 00000000000000c0\n[ 1.248731] RIP: 0010:pci_read_config_byte+0x5/0x40\n[ 1.253998] Call Trace:\n[ 1.254131] ? alcor_pci_find_cap_offset.isra.0+0x3a/0x100 [alcor_pci]\n[ 1.254476] alcor_pci_probe+0x169/0x2d5 [alcor_pci]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/cardreader/alcor_pci.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d2639ffdcad463b358b6bef8645ff81715daffcb", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "58f69684ba03e5b0e0a3ae844a845280c0f06309", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "717cf5ae52322ddbdf3ac2c584b34c5970b0d174", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "09d154990ca82d14aed2b72796f6c8845e2e605d", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3ce3e45cc333da707d4d6eb433574b990bcc26f5", "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/misc/cardreader/alcor_pci.c"], "versions": [{"version": "5.4.134", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.52", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.19", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13.4", "lessThanOrEqual": "5.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.14", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.12.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.13.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d2639ffdcad463b358b6bef8645ff81715daffcb"}, {"url": "https://git.kernel.org/stable/c/58f69684ba03e5b0e0a3ae844a845280c0f06309"}, {"url": "https://git.kernel.org/stable/c/717cf5ae52322ddbdf3ac2c584b34c5970b0d174"}, {"url": "https://git.kernel.org/stable/c/09d154990ca82d14aed2b72796f6c8845e2e605d"}, {"url": "https://git.kernel.org/stable/c/3ce3e45cc333da707d4d6eb433574b990bcc26f5"}], "title": "misc: alcor_pci: fix null-ptr-deref when there is no PCI bridge", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2024-05-29T18:10:17.261528Z", "id": "CVE-2021-47333", "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": "2024-10-31T15:28:29.646Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:08.457Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/d2639ffdcad463b358b6bef8645ff81715daffcb", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/58f69684ba03e5b0e0a3ae844a845280c0f06309", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/717cf5ae52322ddbdf3ac2c584b34c5970b0d174", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/09d154990ca82d14aed2b72796f6c8845e2e605d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3ce3e45cc333da707d4d6eb433574b990bcc26f5", "tags": ["x_transferred"]}]}]}}

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alcor_pci_find_cap_offset.isra.0+0x3a/0x100 [alcor_pci]\n[ 1.254476] alcor_pci_probe+0x169/0x2d5 [alcor_pci]"}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:03:52.163Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47333", "state": "PUBLISHED", "dateUpdated": "2024-11-04T12:03:52.163Z", "dateReserved": "2024-05-21T14:28:16.975Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T14:35:43.760Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E8906CE9-ED5B-4D67-A356-65A3B757C7A7", "versionEndExcluding": "5.4.134", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7C1E6FB6-53C8-4DC4-8AE5-93094BA39F62", "versionEndExcluding": "5.10.52", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "34C1A2F4-DD44-4CF1-8FD4-751A0D746A9E", "versionEndExcluding": "5.12.19", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F93FA3CC-0C79-410B-A7D7-245C2AA0723A", "versionEndExcluding": "5.13.4", "versionStartIncluding": "5.13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: alcor_pci: fix null-ptr-deref when there is no PCI bridge\n\nThere is an issue with the ASPM(optional) capability checking function.\nA device might be attached to root complex directly, in this case,\nbus->self(bridge) will be NULL, thus priv->parent_pdev is NULL.\nSince alcor_pci_init_check_aspm(priv->parent_pdev) checks the PCI link's\nASPM capability and populate parent_cap_off, which will be used later by\nalcor_pci_aspm_ctrl() to dynamically turn on/off device, what we can do\nhere is to avoid checking the capability if we are on the root complex.\nThis will make pdev_cap_off 0 and alcor_pci_aspm_ctrl() will simply\nreturn when bring called, effectively disable ASPM for the device.\n\n[ 1.246492] BUG: kernel NULL pointer dereference, address: 00000000000000c0\n[ 1.248731] RIP: 0010:pci_read_config_byte+0x5/0x40\n[ 1.253998] Call Trace:\n[ 1.254131] ? alcor_pci_find_cap_offset.isra.0+0x3a/0x100 [alcor_pci]\n[ 1.254476] alcor_pci_probe+0x169/0x2d5 [alcor_pci]"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: misc: alcor_pci: corrige null-ptr-deref cuando no hay un puente PCI. Hay un problema con la funci\u00f3n de verificaci\u00f3n de capacidad ASPM (opcional). Un dispositivo se puede conectar directamente al complejo root; en este caso, bus->self(bridge) ser\u00e1 NULL, por lo tanto, priv->parent_pdev es NULL. Dado que alcor_pci_init_check_aspm(priv->parent_pdev) verifica la capacidad ASPM del enlace PCI y completa parent_cap_off, que ser\u00e1 utilizado m\u00e1s adelante por alcor_pci_aspm_ctrl() para encender/apagar din\u00e1micamente el dispositivo, lo que podemos hacer aqu\u00ed es evitar verificar la capacidad si estamos encendidos. el complejo ra\u00edz. Esto har\u00e1 que pdev_cap_off sea 0 y alcor_pci_aspm_ctrl() simplemente regrese cuando se llame a Bring, deshabilitando efectivamente ASPM para el dispositivo. [1.246492] BUG: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000c0 [1.248731] RIP: 0010:pci_read_config_byte+0x5/0x40 [1.253998] Seguimiento de llamadas: [1.254131]? alcor_pci_find_cap_offset.isra.0+0x3a/0x100 [alcor_pci] [ 1.254476] alcor_pci_probe+0x169/0x2d5 [alcor_pci]"}], "id": "CVE-2021-47333", "lastModified": "2025-04-02T14:32:09.983", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-05-21T15:15:20.200", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/09d154990ca82d14aed2b72796f6c8845e2e605d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3ce3e45cc333da707d4d6eb433574b990bcc26f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/58f69684ba03e5b0e0a3ae844a845280c0f06309"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/717cf5ae52322ddbdf3ac2c584b34c5970b0d174"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d2639ffdcad463b358b6bef8645ff81715daffcb"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/09d154990ca82d14aed2b72796f6c8845e2e605d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3ce3e45cc333da707d4d6eb433574b990bcc26f5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/58f69684ba03e5b0e0a3ae844a845280c0f06309"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/717cf5ae52322ddbdf3ac2c584b34c5970b0d174"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d2639ffdcad463b358b6bef8645ff81715daffcb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: misc: alcor_pci: fix null-ptr-deref when there is no PCI bridge", "id": "2282427", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282427"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmisc: alcor_pci: fix null-ptr-deref when there is no PCI bridge\nThere is an issue with the ASPM(optional) capability checking function.\nA device might be attached to root complex directly, in this case,\nbus->self(bridge) will be NULL, thus priv->parent_pdev is NULL.\nSince alcor_pci_init_check_aspm(priv->parent_pdev) checks the PCI link's\nASPM capability and populate parent_cap_off, which will be used later by\nalcor_pci_aspm_ctrl() to dynamically turn on/off device, what we can do\nhere is to avoid checking the capability if we are on the root complex.\nThis will make pdev_cap_off 0 and alcor_pci_aspm_ctrl() will simply\nreturn when bring called, effectively disable ASPM for the device.\n[ 1.246492] BUG: kernel NULL pointer dereference, address: 00000000000000c0\n[ 1.248731] RIP: 0010:pci_read_config_byte+0x5/0x40\n[ 1.253998] Call Trace:\n[ 1.254131] ? alcor_pci_find_cap_offset.isra.0+0x3a/0x100 [alcor_pci]\n[ 1.254476] alcor_pci_probe+0x169/0x2d5 [alcor_pci]"], "name": "CVE-2021-47333", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47333\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47333"], "threat_severity": "Low"}