{"id":"CVE-2026-98640","revision":null,"records":[{"revision":"f9412fe932c648c4b4d5e655b753af79","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98640","aliases":[],"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 \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":0,"publishedAt":"2026-10-18T15:20:11.777+00:00","modifiedAt":"2026-10-19T09:23:09.98+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/hid/amd-sfh-hid/amd_sfh_common.h\",\n \"drivers/hid/amd-sfh-hid/amd_sfh_pcie.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4f567b9f8141a86c7d878fadf136e5d1408e3e61\",\n \"lessThan\": \"92bf2883da0306ab9d1eb794acd1058fc5088ebc\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4f567b9f8141a86c7d878fadf136e5d1408e3e61\",\n \"lessThan\": \"7b3747d77767f066ccf4a9e8e3a8381643ab5368\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4f567b9f8141a86c7d878fadf136e5d1408e3e61\",\n \"lessThan\": \"5ff24aa7af0bca0780fe4e6effce902065f2c0a7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4f567b9f8141a86c7d878fadf136e5d1408e3e61\",\n \"lessThan\": \"dc687489131559ee52f447592f6d039a5a013061\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4f567b9f8141a86c7d878fadf136e5d1408e3e61\",\n \"lessThan\": \"5f9e2ecb725adced013fbf5f94b9f185fad2e7d9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4f567b9f8141a86c7d878fadf136e5d1408e3e61\",\n \"lessThan\": \"ee25833f037fa22d23ffdbfeebabe3579e8a0346\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4f567b9f8141a86c7d878fadf136e5d1408e3e61\",\n \"lessThan\": \"65bcc5f89704efe5b9d69d4ea2c1002d90c31382\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/hid/amd-sfh-hid/amd_sfh_common.h\",\n \"drivers/hid/amd-sfh-hid/amd_sfh_pcie.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.11\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.11\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.222\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.189\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.158\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.112\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.55\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.9\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/92bf2883da0306ab9d1eb794acd1058fc5088ebc","https://git.kernel.org/stable/c/7b3747d77767f066ccf4a9e8e3a8381643ab5368","https://git.kernel.org/stable/c/5ff24aa7af0bca0780fe4e6effce902065f2c0a7","https://git.kernel.org/stable/c/dc687489131559ee52f447592f6d039a5a013061","https://git.kernel.org/stable/c/5f9e2ecb725adced013fbf5f94b9f185fad2e7d9","https://git.kernel.org/stable/c/ee25833f037fa22d23ffdbfeebabe3579e8a0346","https://git.kernel.org/stable/c/65bcc5f89704efe5b9d69d4ea2c1002d90c31382"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98640","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98640","identifiers":["CVE-2026-98640"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-24T10:27:30.8908525+00:00","complete":true,"records":1756,"lastAttemptAt":"2026-10-24T10:27:30.8908525+00:00","lastSuccessAt":"2026-10-24T10:27:31.1285633+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:31.1285641+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-9b3cad78792c7367da03684feab05819ddebc4d137048bdbbdabdbb4d2879391-c6a8234687801ee57ab2aeb77d20947f334a6cc2941ea8b25213d5a7dcebf0ce","complete":true,"records":413884,"lastAttemptAt":"2026-10-24T10:27:30.7016219+00:00","lastSuccessAt":"2026-10-24T10:27:30.6836858+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:30.7016219+00:00","snapshotPublishedAt":"2026-10-24T10:24:24+00:00","importing":false,"stagedRecords":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-24T10:27:30.8908525+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-24T10:27:30.8908525+00:00","lastSuccessAt":"2026-10-24T10:27:31.3689689+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:31.3689698+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-16ad89dfea13ab9e9b0108e63a759d63bd4559cc68b58491107d62ee35bbbaf2","complete":true,"records":1965,"lastAttemptAt":"2026-10-24T10:27:30.7587662+00:00","lastSuccessAt":"2026-10-23T16:01:26.4487605+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:30.7587662+00:00","snapshotPublishedAt":"2026-10-21T12:18:07+00:00","importing":false,"stagedRecords":0}]}