CVE-2026-80651

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80651", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.779Z", "datePublished": "2026-08-28T06:48:59.460Z", "dateUpdated": "2026-08-28T06:48:59.460Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-28T06:48:59.460Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL\n\ndsm_create() initially checks pdev->bus when computing segment_id:\n\n\tu8 segment_id = pdev->bus ? pci_domain_nr(pdev->bus) : 0;\n\nBut the next two lines unconditionally dereference pdev->bus via\npcie_find_root_port() and especially pci_dev_id(pdev), which expands\nto PCI_DEVID(dev->bus->number, dev->devfn). If pdev->bus is in fact\nNULL, segment_id is initialised to 0 but the very next statement\ncrashes the kernel.\n\nsmatch flags this:\n\n drivers/crypto/ccp/sev-dev-tsm.c:253 dsm_create() error: we\n previously assumed 'pdev->bus' could be null (see line 251)\n\nMake the NULL handling consistent: if pdev->bus is NULL the device\nhas no PCI context to work with and SEV TIO setup cannot proceed,\nso return -ENODEV before any of the bus-dependent lookups. The\nremaining initialisation now runs only on the path where pdev->bus\nis known to be valid.\n\nNo change for callers where pdev->bus is non-NULL, which is the\nonly case where dsm_create() did meaningful work before this change."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/crypto/ccp/sev-dev-tsm.c"], "versions": [{"version": "4be423572da1f4c11f45168e3fafda870ddac9f8", "lessThan": "6bafd740095fb3d0e9a00540bc8f3484c38e6f85", "status": "affected", "versionType": "git"}, {"version": "4be423572da1f4c11f45168e3fafda870ddac9f8", "lessThan": "930d9d36ea618a775985446a125aedeb401db522", "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/crypto/ccp/sev-dev-tsm.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.19", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6bafd740095fb3d0e9a00540bc8f3484c38e6f85"}, {"url": "https://git.kernel.org/stable/c/930d9d36ea618a775985446a125aedeb401db522"}], "title": "crypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/crypto/ccp/sev-dev-tsm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6bafd740095fb3d0e9a00540bc8f3484c38e6f85", "status": "affected", "version": "4be423572da1f4c11f45168e3fafda870ddac9f8", "versionType": "git"}, {"lessThan": "930d9d36ea618a775985446a125aedeb401db522", "status": "affected", "version": "4be423572da1f4c11f45168e3fafda870ddac9f8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/crypto/ccp/sev-dev-tsm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\ncrypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL\n\ndsm_create() initially checks pdev->bus when computing segment_id:\n\n\tu8 segment_id = pdev->bus ? pci_domain_nr(pdev->bus) : 0;\n\nBut the next two lines unconditionally dereference pdev->bus via\npcie_find_root_port() and especially pci_dev_id(pdev), which expands\nto PCI_DEVID(dev->bus->number, dev->devfn). If pdev->bus is in fact\nNULL, segment_id is initialised to 0 but the very next statement\ncrashes the kernel.\n\nsmatch flags this:\n\n drivers/crypto/ccp/sev-dev-tsm.c:253 dsm_create() error: we\n previously assumed 'pdev->bus' could be null (see line 251)\n\nMake the NULL handling consistent: if pdev->bus is NULL the device\nhas no PCI context to work with and SEV TIO setup cannot proceed,\nso return -ENODEV before any of the bus-dependent lookups. The\nremaining initialisation now runs only on the path where pdev->bus\nis known to be valid.\n\nNo change for callers where pdev->bus is non-NULL, which is the\nonly case where dsm_create() did meaningful work before this change."}], "id": "CVE-2026-80651", "lastModified": "2026-08-28T08:16:50.110", "metrics": {}, "published": "2026-08-28T08:16:50.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6bafd740095fb3d0e9a00540bc8f3484c38e6f85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/930d9d36ea618a775985446a125aedeb401db522"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: crypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL", "id": "2525493", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525493"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncrypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL\ndsm_create() initially checks pdev->bus when computing segment_id:\nu8 segment_id = pdev->bus ? pci_domain_nr(pdev->bus) : 0;\nBut the next two lines unconditionally dereference pdev->bus via\npcie_find_root_port() and especially pci_dev_id(pdev), which expands\nto PCI_DEVID(dev->bus->number, dev->devfn). If pdev->bus is in fact\nNULL, segment_id is initialised to 0 but the very next statement\ncrashes the kernel.\nsmatch flags this:\ndrivers/crypto/ccp/sev-dev-tsm.c:253 dsm_create() error: we\npreviously assumed 'pdev->bus' could be null (see line 251)\nMake the NULL handling consistent: if pdev->bus is NULL the device\nhas no PCI context to work with and SEV TIO setup cannot proceed,\nso return -ENODEV before any of the bus-dependent lookups. The\nremaining initialisation now runs only on the path where pdev->bus\nis known to be valid.\nNo change for callers where pdev->bus is non-NULL, which is the\nonly case where dsm_create() did meaningful work before this change.", "A flaw was found in the Linux kernel's `crypto: ccp/sev-dev-tsm` module. The `dsm_create()` function fails to properly validate the `pdev->bus` pointer, leading to a null pointer dereference. A local attacker could exploit this vulnerability to trigger a kernel crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-80651", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80651\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80651\nhttps://lore.kernel.org/linux-cve-announce/2026082843-CVE-2026-80651-d51b@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4be423572da1f4c11f45168e3fafda870ddac9f8,6bafd740095fb3d0e9a00540bc8f3484c38e6f85)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4be423572da1f4c11f45168e3fafda870ddac9f8,930d9d36ea618a775985446a125aedeb401db522)"}}], "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": "semver", "value": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-28T11:15:03.528812+00:00", "updated": "2026-09-01T15:00:11.924100+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}