{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98640", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.361Z", "datePublished": "2026-10-18T15:20:11.777Z", "dateUpdated": "2026-10-19T09:23:09.980Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:23:09.980Z" }, "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 \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." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/amd-sfh-hid/amd_sfh_common.h", "drivers/hid/amd-sfh-hid/amd_sfh_pcie.c" ], "versions": [ { "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61", "lessThan": "92bf2883da0306ab9d1eb794acd1058fc5088ebc", "status": "affected", "versionType": "git" }, { "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61", "lessThan": "7b3747d77767f066ccf4a9e8e3a8381643ab5368", "status": "affected", "versionType": "git" }, { "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61", "lessThan": "5ff24aa7af0bca0780fe4e6effce902065f2c0a7", "status": "affected", "versionType": "git" }, { "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61", "lessThan": "dc687489131559ee52f447592f6d039a5a013061", "status": "affected", "versionType": "git" }, { "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61", "lessThan": "5f9e2ecb725adced013fbf5f94b9f185fad2e7d9", "status": "affected", "versionType": "git" }, { "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61", "lessThan": "ee25833f037fa22d23ffdbfeebabe3579e8a0346", "status": "affected", "versionType": "git" }, { "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61", "lessThan": "65bcc5f89704efe5b9d69d4ea2c1002d90c31382", "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/hid/amd-sfh-hid/amd_sfh_common.h", "drivers/hid/amd-sfh-hid/amd_sfh_pcie.c" ], "versions": [ { "version": "5.11", "status": "affected" }, { "version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "5.11", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.18.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.2.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.3" } ] } ] } ], "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" } } } }