{"dataType":"CVE_RECORD","dataVersion":"5.2","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":"2025-12-18T11:36:55.223Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-18T11:36:55.223Z"},"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":"4f556bc04e3c0de2f5c69adc9e9f2bcefcad079d","lessThan":"d2639ffdcad463b358b6bef8645ff81715daffcb","status":"affected","versionType":"git"},{"version":"4f556bc04e3c0de2f5c69adc9e9f2bcefcad079d","lessThan":"58f69684ba03e5b0e0a3ae844a845280c0f06309","status":"affected","versionType":"git"},{"version":"4f556bc04e3c0de2f5c69adc9e9f2bcefcad079d","lessThan":"717cf5ae52322ddbdf3ac2c584b34c5970b0d174","status":"affected","versionType":"git"},{"version":"4f556bc04e3c0de2f5c69adc9e9f2bcefcad079d","lessThan":"09d154990ca82d14aed2b72796f6c8845e2e605d","status":"affected","versionType":"git"},{"version":"4f556bc04e3c0de2f5c69adc9e9f2bcefcad079d","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":"5.0","status":"affected"},{"version":"0","lessThan":"5.0","status":"unaffected","versionType":"semver"},{"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:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.4.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.10.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.12.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.13.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","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"]}]}]}}