{"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"}}}}