{"apiVersion":"1.0","identifier":"CVE-2026-80651","description":"In the Linux kernel, the following vulnerability has been resolved: crypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL dsm_create() initially checks pdev->bus when computing segment_id: u8 segment_id = pdev->bus ? pci_domain_nr(pdev->bus) : 0; But the next two lines unconditionally dereference pdev->bus via pcie_find_root_port() and especially pci_dev_id(pdev), which expands to PCI_DEVID(dev->bus->number, dev->devfn). If pdev->bus is in fact NULL, segment_id is initialised to 0 but the very next statement crashes the kernel. smatch flags this: drivers/crypto/ccp/sev-dev-tsm.c:253 dsm_create() error: we previously assumed -pdev->bus- could be null (see line 251) Make the NULL handling consistent: if pdev->bus is NULL the device has no PCI context to work with and SEV TIO setup cannot proceed, so return -ENODEV before any of the bus-dependent lookups. The remaining initialisation now runs only on the path where pdev->bus is known to be valid. No change for callers where pdev->bus is non-NULL, which is the only case where dsm_create() did meaningful work before this change.","publishedAt":"2026-08-28T08:16:50","lastModifiedAt":"2026-08-28T08:16:50","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80651","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00155,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80651","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80651","en":"https://www.redsauce.net/en/cves/CVE-2026-80651","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80651","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80651","de":"https://www.redsauce.net/de/cves/CVE-2026-80651","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80651","el":"https://www.redsauce.net/el/cves/CVE-2026-80651"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80651"}}