{"api_version":"1","generated_at":"2026-10-20T18:03:16+00:00","cve":"CVE-2025-40034","urls":{"html":"https://cve.report/CVE-2025-40034","api":"https://cve.report/api/cve/CVE-2025-40034.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40034","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40034"},"summary":{"title":"PCI/AER: Avoid NULL pointer dereference in aer_ratelimit()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/AER: Avoid NULL pointer dereference in aer_ratelimit()\n\nWhen platform firmware supplies error information to the OS, e.g., via the\nACPI APEI GHES mechanism, it may identify an error source device that\ndoesn't advertise an AER Capability and therefore dev->aer_info, which\ncontains AER stats and ratelimiting data, is NULL.\n\npci_dev_aer_stats_incr() already checks dev->aer_info for NULL, but\naer_ratelimit() did not, leading to NULL pointer dereferences like this one\nfrom the URL below:\n\n  {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0\n  {1}[Hardware Error]: event severity: corrected\n  {1}[Hardware Error]:   device_id: 0000:00:00.0\n  {1}[Hardware Error]:   vendor_id: 0x8086, device_id: 0x2020\n  {1}[Hardware Error]:   aer_cor_status: 0x00001000, aer_cor_mask: 0x00002000\n  BUG: kernel NULL pointer dereference, address: 0000000000000264\n  RIP: 0010:___ratelimit+0xc/0x1b0\n  pci_print_aer+0x141/0x360\n  aer_recover_work_func+0xb5/0x130\n\n[8086:2020] is an Intel \"Sky Lake-E DMI3 Registers\" device that claims to\nbe a Root Port but does not advertise an AER Capability.\n\nAdd a NULL check in aer_ratelimit() to avoid the NULL pointer dereference.\nNote that this also prevents ratelimiting these events from GHES.\n\n[bhelgaas: add crash details to commit log]","state":"PUBLISHED","assigner":"Linux","published_at":"2025-10-28 12:15:37","updated_at":"2026-10-19 21:10:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/41683624cbff0a26bb7e0627f4a7e1b51a8779a8","name":"https://git.kernel.org/stable/c/41683624cbff0a26bb7e0627f4a7e1b51a8779a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/deb2f228388ff3a9d0623e3b59a053e9235c341d","name":"https://git.kernel.org/stable/c/deb2f228388ff3a9d0623e3b59a053e9235c341d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40034","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40034","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a57f2bfb4a5863f83087867c0e671f2418212d23 41683624cbff0a26bb7e0627f4a7e1b51a8779a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a57f2bfb4a5863f83087867c0e671f2418212d23 deb2f228388ff3a9d0623e3b59a053e9235c341d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17.3 6.17.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2025","cve_id":"40034","cve":"CVE-2025-40034","epss":"0.002000000","percentile":"0.092030000","score_date":"2026-10-19","updated_at":"2026-10-20 00:13:48"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/pci/pcie/aer.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"41683624cbff0a26bb7e0627f4a7e1b51a8779a8","status":"affected","version":"a57f2bfb4a5863f83087867c0e671f2418212d23","versionType":"git"},{"lessThan":"deb2f228388ff3a9d0623e3b59a053e9235c341d","status":"affected","version":"a57f2bfb4a5863f83087867c0e671f2418212d23","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/pci/pcie/aer.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.17.*","status":"unaffected","version":"6.17.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.18","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17.3","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18","versionStartIncluding":"6.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/AER: Avoid NULL pointer dereference in aer_ratelimit()\n\nWhen platform firmware supplies error information to the OS, e.g., via the\nACPI APEI GHES mechanism, it may identify an error source device that\ndoesn't advertise an AER Capability and therefore dev->aer_info, which\ncontains AER stats and ratelimiting data, is NULL.\n\npci_dev_aer_stats_incr() already checks dev->aer_info for NULL, but\naer_ratelimit() did not, leading to NULL pointer dereferences like this one\nfrom the URL below:\n\n  {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0\n  {1}[Hardware Error]: event severity: corrected\n  {1}[Hardware Error]:   device_id: 0000:00:00.0\n  {1}[Hardware Error]:   vendor_id: 0x8086, device_id: 0x2020\n  {1}[Hardware Error]:   aer_cor_status: 0x00001000, aer_cor_mask: 0x00002000\n  BUG: kernel NULL pointer dereference, address: 0000000000000264\n  RIP: 0010:___ratelimit+0xc/0x1b0\n  pci_print_aer+0x141/0x360\n  aer_recover_work_func+0xb5/0x130\n\n[8086:2020] is an Intel \"Sky Lake-E DMI3 Registers\" device that claims to\nbe a Root Port but does not advertise an AER Capability.\n\nAdd a NULL check in aer_ratelimit() to avoid the NULL pointer dereference.\nNote that this also prevents ratelimiting these events from GHES.\n\n[bhelgaas: add crash details to commit log]"}],"providerMetadata":{"dateUpdated":"2026-05-11T21:41:12.240Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/41683624cbff0a26bb7e0627f4a7e1b51a8779a8"},{"url":"https://git.kernel.org/stable/c/deb2f228388ff3a9d0623e3b59a053e9235c341d"}],"title":"PCI/AER: Avoid NULL pointer dereference in aer_ratelimit()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-40034","datePublished":"2025-10-28T11:48:16.335Z","dateReserved":"2025-04-16T07:20:57.153Z","dateUpdated":"2026-05-11T21:41:12.240Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-10-28 12:15:37","lastModifiedDate":"2026-10-19 21:10:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40034","Ordinal":"1","Title":"PCI/AER: Avoid NULL pointer dereference in aer_ratelimit()","CVE":"CVE-2025-40034","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40034","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/AER: Avoid NULL pointer dereference in aer_ratelimit()\n\nWhen platform firmware supplies error information to the OS, e.g., via the\nACPI APEI GHES mechanism, it may identify an error source device that\ndoesn't advertise an AER Capability and therefore dev->aer_info, which\ncontains AER stats and ratelimiting data, is NULL.\n\npci_dev_aer_stats_incr() already checks dev->aer_info for NULL, but\naer_ratelimit() did not, leading to NULL pointer dereferences like this one\nfrom the URL below:\n\n  {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0\n  {1}[Hardware Error]: event severity: corrected\n  {1}[Hardware Error]:   device_id: 0000:00:00.0\n  {1}[Hardware Error]:   vendor_id: 0x8086, device_id: 0x2020\n  {1}[Hardware Error]:   aer_cor_status: 0x00001000, aer_cor_mask: 0x00002000\n  BUG: kernel NULL pointer dereference, address: 0000000000000264\n  RIP: 0010:___ratelimit+0xc/0x1b0\n  pci_print_aer+0x141/0x360\n  aer_recover_work_func+0xb5/0x130\n\n[8086:2020] is an Intel \"Sky Lake-E DMI3 Registers\" device that claims to\nbe a Root Port but does not advertise an AER Capability.\n\nAdd a NULL check in aer_ratelimit() to avoid the NULL pointer dereference.\nNote that this also prevents ratelimiting these events from GHES.\n\n[bhelgaas: add crash details to commit log]","Type":"Description","Title":"PCI/AER: Avoid NULL pointer dereference in aer_ratelimit()"}]}}}