{"api_version":"1","generated_at":"2026-10-21T11:52:26+00:00","cve":"CVE-2026-98640","urls":{"html":"https://cve.report/CVE-2026-98640","api":"https://cve.report/api/cve/CVE-2026-98640.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98640","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98640"},"summary":{"title":"HID: amd_sfh: Validate PCI BAR size before mapping","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: amd_sfh: Validate PCI BAR size before mapping\n\nThe amd_sfh driver maps PCI BAR 2 using pcim_iomap_regions() and\nsubsequently accesses MMIO registers at offsets up to 0x10958 (e.g.,\nAMD_P2C_MSG3 at 0x1068C). However, the driver never validates that the BAR\nsize is large enough to cover these accesses. If the driver is bound to a\ndevice with a smaller BAR 2, this leads to an out-of-bounds memory access\nand a page fault during the probe function.\n\nFor example, a page fault can occur when reading from privdata->mmio +\nAMD_P2C_MSG3 in mp2_select_ops():\n\n  BUG: unable to handle page fault for address: ffffc9000390368c\n  PGD 100000067 P4D 100000067 PUD 1012c1067 PMD 105b64067 PTE 0\n  Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n  RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]\n  RIP: 0010:mp2_select_ops drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:282\n  [inline]\n  RIP: 0010:amd_mp2_pci_probe+0x337/0x5f0\n  drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:487\n  Call Trace:\n   <TASK>\n   local_pci_probe drivers/pci/pci-driver.c:332 [inline]\n   pci_call_probe drivers/pci/pci-driver.c:394 [inline]\n   __pci_device_probe drivers/pci/pci-driver.c:455 [inline]\n   pci_device_probe+0x431/0xc90 drivers/pci/pci-driver.c:489\n\nFix this by verifying that the length of BAR 2 is at least 128KB before\nattempting to map it. Since the maximum accessed offset is 0x10958, and PCI\nBAR sizes are powers of 2, any legitimate hardware will have a BAR size of\nat least 128KB.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:17","updated_at":"2026-10-19 10:19:28"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ee25833f037fa22d23ffdbfeebabe3579e8a0346","name":"https://git.kernel.org/stable/c/ee25833f037fa22d23ffdbfeebabe3579e8a0346","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5ff24aa7af0bca0780fe4e6effce902065f2c0a7","name":"https://git.kernel.org/stable/c/5ff24aa7af0bca0780fe4e6effce902065f2c0a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5f9e2ecb725adced013fbf5f94b9f185fad2e7d9","name":"https://git.kernel.org/stable/c/5f9e2ecb725adced013fbf5f94b9f185fad2e7d9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dc687489131559ee52f447592f6d039a5a013061","name":"https://git.kernel.org/stable/c/dc687489131559ee52f447592f6d039a5a013061","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7b3747d77767f066ccf4a9e8e3a8381643ab5368","name":"https://git.kernel.org/stable/c/7b3747d77767f066ccf4a9e8e3a8381643ab5368","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/92bf2883da0306ab9d1eb794acd1058fc5088ebc","name":"https://git.kernel.org/stable/c/92bf2883da0306ab9d1eb794acd1058fc5088ebc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/65bcc5f89704efe5b9d69d4ea2c1002d90c31382","name":"https://git.kernel.org/stable/c/65bcc5f89704efe5b9d69d4ea2c1002d90c31382","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98640","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98640","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f567b9f8141a86c7d878fadf136e5d1408e3e61 92bf2883da0306ab9d1eb794acd1058fc5088ebc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f567b9f8141a86c7d878fadf136e5d1408e3e61 7b3747d77767f066ccf4a9e8e3a8381643ab5368 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f567b9f8141a86c7d878fadf136e5d1408e3e61 5ff24aa7af0bca0780fe4e6effce902065f2c0a7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f567b9f8141a86c7d878fadf136e5d1408e3e61 dc687489131559ee52f447592f6d039a5a013061 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f567b9f8141a86c7d878fadf136e5d1408e3e61 5f9e2ecb725adced013fbf5f94b9f185fad2e7d9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f567b9f8141a86c7d878fadf136e5d1408e3e61 ee25833f037fa22d23ffdbfeebabe3579e8a0346 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f567b9f8141a86c7d878fadf136e5d1408e3e61 65bcc5f89704efe5b9d69d4ea2c1002d90c31382 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hid/amd-sfh-hid/amd_sfh_common.h","drivers/hid/amd-sfh-hid/amd_sfh_pcie.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"92bf2883da0306ab9d1eb794acd1058fc5088ebc","status":"affected","version":"4f567b9f8141a86c7d878fadf136e5d1408e3e61","versionType":"git"},{"lessThan":"7b3747d77767f066ccf4a9e8e3a8381643ab5368","status":"affected","version":"4f567b9f8141a86c7d878fadf136e5d1408e3e61","versionType":"git"},{"lessThan":"5ff24aa7af0bca0780fe4e6effce902065f2c0a7","status":"affected","version":"4f567b9f8141a86c7d878fadf136e5d1408e3e61","versionType":"git"},{"lessThan":"dc687489131559ee52f447592f6d039a5a013061","status":"affected","version":"4f567b9f8141a86c7d878fadf136e5d1408e3e61","versionType":"git"},{"lessThan":"5f9e2ecb725adced013fbf5f94b9f185fad2e7d9","status":"affected","version":"4f567b9f8141a86c7d878fadf136e5d1408e3e61","versionType":"git"},{"lessThan":"ee25833f037fa22d23ffdbfeebabe3579e8a0346","status":"affected","version":"4f567b9f8141a86c7d878fadf136e5d1408e3e61","versionType":"git"},{"lessThan":"65bcc5f89704efe5b9d69d4ea2c1002d90c31382","status":"affected","version":"4f567b9f8141a86c7d878fadf136e5d1408e3e61","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hid/amd-sfh-hid/amd_sfh_common.h","drivers/hid/amd-sfh-hid/amd_sfh_pcie.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.11"},{"lessThan":"5.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"5.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: amd_sfh: Validate PCI BAR size before mapping\n\nThe amd_sfh driver maps PCI BAR 2 using pcim_iomap_regions() and\nsubsequently accesses MMIO registers at offsets up to 0x10958 (e.g.,\nAMD_P2C_MSG3 at 0x1068C). However, the driver never validates that the BAR\nsize is large enough to cover these accesses. If the driver is bound to a\ndevice with a smaller BAR 2, this leads to an out-of-bounds memory access\nand a page fault during the probe function.\n\nFor example, a page fault can occur when reading from privdata->mmio +\nAMD_P2C_MSG3 in mp2_select_ops():\n\n  BUG: unable to handle page fault for address: ffffc9000390368c\n  PGD 100000067 P4D 100000067 PUD 1012c1067 PMD 105b64067 PTE 0\n  Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n  RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]\n  RIP: 0010:mp2_select_ops drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:282\n  [inline]\n  RIP: 0010:amd_mp2_pci_probe+0x337/0x5f0\n  drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:487\n  Call Trace:\n   <TASK>\n   local_pci_probe drivers/pci/pci-driver.c:332 [inline]\n   pci_call_probe drivers/pci/pci-driver.c:394 [inline]\n   __pci_device_probe drivers/pci/pci-driver.c:455 [inline]\n   pci_device_probe+0x431/0xc90 drivers/pci/pci-driver.c:489\n\nFix this by verifying that the length of BAR 2 is at least 128KB before\nattempting to map it. Since the maximum accessed offset is 0x10958, and PCI\nBAR sizes are powers of 2, any legitimate hardware will have a BAR size of\nat least 128KB."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:23:09.980Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/92bf2883da0306ab9d1eb794acd1058fc5088ebc"},{"url":"https://git.kernel.org/stable/c/7b3747d77767f066ccf4a9e8e3a8381643ab5368"},{"url":"https://git.kernel.org/stable/c/5ff24aa7af0bca0780fe4e6effce902065f2c0a7"},{"url":"https://git.kernel.org/stable/c/dc687489131559ee52f447592f6d039a5a013061"},{"url":"https://git.kernel.org/stable/c/5f9e2ecb725adced013fbf5f94b9f185fad2e7d9"},{"url":"https://git.kernel.org/stable/c/ee25833f037fa22d23ffdbfeebabe3579e8a0346"},{"url":"https://git.kernel.org/stable/c/65bcc5f89704efe5b9d69d4ea2c1002d90c31382"}],"title":"HID: amd_sfh: Validate PCI BAR size before mapping","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98640","datePublished":"2026-10-18T15:20:11.777Z","dateReserved":"2026-09-25T10:25:14.361Z","dateUpdated":"2026-10-19T09:23:09.980Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:17","lastModifiedDate":"2026-10-19 10:19:28","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98640","Ordinal":"1","Title":"HID: amd_sfh: Validate PCI BAR size before mapping","CVE":"CVE-2026-98640","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98640","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: amd_sfh: Validate PCI BAR size before mapping\n\nThe amd_sfh driver maps PCI BAR 2 using pcim_iomap_regions() and\nsubsequently accesses MMIO registers at offsets up to 0x10958 (e.g.,\nAMD_P2C_MSG3 at 0x1068C). However, the driver never validates that the BAR\nsize is large enough to cover these accesses. If the driver is bound to a\ndevice with a smaller BAR 2, this leads to an out-of-bounds memory access\nand a page fault during the probe function.\n\nFor example, a page fault can occur when reading from privdata->mmio +\nAMD_P2C_MSG3 in mp2_select_ops():\n\n  BUG: unable to handle page fault for address: ffffc9000390368c\n  PGD 100000067 P4D 100000067 PUD 1012c1067 PMD 105b64067 PTE 0\n  Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n  RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]\n  RIP: 0010:mp2_select_ops drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:282\n  [inline]\n  RIP: 0010:amd_mp2_pci_probe+0x337/0x5f0\n  drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:487\n  Call Trace:\n   <TASK>\n   local_pci_probe drivers/pci/pci-driver.c:332 [inline]\n   pci_call_probe drivers/pci/pci-driver.c:394 [inline]\n   __pci_device_probe drivers/pci/pci-driver.c:455 [inline]\n   pci_device_probe+0x431/0xc90 drivers/pci/pci-driver.c:489\n\nFix this by verifying that the length of BAR 2 is at least 128KB before\nattempting to map it. Since the maximum accessed offset is 0x10958, and PCI\nBAR sizes are powers of 2, any legitimate hardware will have a BAR size of\nat least 128KB.","Type":"Description","Title":"HID: amd_sfh: Validate PCI BAR size before mapping"}]}}}