CVE-2026-98640

{"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 <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."}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-98640", "lastModified": "2026-10-19T10:19:28.220", "metrics": {}, "published": "2026-10-18T16:17:17.123", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5f9e2ecb725adced013fbf5f94b9f185fad2e7d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5ff24aa7af0bca0780fe4e6effce902065f2c0a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/65bcc5f89704efe5b9d69d4ea2c1002d90c31382"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7b3747d77767f066ccf4a9e8e3a8381643ab5368"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/92bf2883da0306ab9d1eb794acd1058fc5088ebc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc687489131559ee52f447592f6d039a5a013061"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ee25833f037fa22d23ffdbfeebabe3579e8a0346"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: HID: amd_sfh: Validate PCI BAR size before mapping", "id": "2554958", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554958"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nHID: amd_sfh: Validate PCI BAR size before mapping\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.\nFor example, a page fault can occur when reading from privdata->mmio +\nAMD_P2C_MSG3 in mp2_select_ops():\nBUG: unable to handle page fault for address: ffffc9000390368c\nPGD 100000067 P4D 100000067 PUD 1012c1067 PMD 105b64067 PTE 0\nOops: Oops: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]\nRIP: 0010:mp2_select_ops drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:282\n[inline]\nRIP: 0010:amd_mp2_pci_probe+0x337/0x5f0\ndrivers/hid/amd-sfh-hid/amd_sfh_pcie.c:487\nCall Trace:\n<TASK>\nlocal_pci_probe drivers/pci/pci-driver.c:332 [inline]\npci_call_probe drivers/pci/pci-driver.c:394 [inline]\n__pci_device_probe drivers/pci/pci-driver.c:455 [inline]\npci_device_probe+0x431/0xc90 drivers/pci/pci-driver.c:489\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.", "A flaw was found in the Linux kernel's AMD Sensor Fusion Hub (amd_sfh) driver. An attacker capable of attaching or emulating a crafted Peripheral Component Interconnect (PCI) device can cause a Denial of Service (DoS) through a system crash. This issue occurs because the driver fails to validate the PCI Base Address Register (BAR) size before accessing device registers, leading to an out-of-bounds memory read during device initialization."], "name": "CVE-2026-98640", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98640\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98640\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98640.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f567b9f8141a86c7d878fadf136e5d1408e3e61,92bf2883da0306ab9d1eb794acd1058fc5088ebc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f567b9f8141a86c7d878fadf136e5d1408e3e61,7b3747d77767f066ccf4a9e8e3a8381643ab5368)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f567b9f8141a86c7d878fadf136e5d1408e3e61,5ff24aa7af0bca0780fe4e6effce902065f2c0a7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f567b9f8141a86c7d878fadf136e5d1408e3e61,dc687489131559ee52f447592f6d039a5a013061)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f567b9f8141a86c7d878fadf136e5d1408e3e61,65bcc5f89704efe5b9d69d4ea2c1002d90c31382)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f567b9f8141a86c7d878fadf136e5d1408e3e61,ee25833f037fa22d23ffdbfeebabe3579e8a0346)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f567b9f8141a86c7d878fadf136e5d1408e3e61,5f9e2ecb725adced013fbf5f94b9f185fad2e7d9)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T22:45:04.779034+00:00", "updated": "2026-10-23T06:45:07.466009+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}