{"id":"CVE-2026-90427","summary":"iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()\n\n__tegra241_cmdqv_probe() uses devm_krealloc() to grow @smmu into the larger\ntegra241_cmdqv, which frees the original @smmu once it relocates. A failure\nafter that returned NULL, and the caller then dereferenced the freed @smmu\non its fallback path.\n\nReturn an int and take @smmu by reference instead, then update *smmu to the\nreallocated pointer after devm_krealloc() succeeds, so the caller and its\nfallback path both use the live @smmu rather than the freed original.","modified":"2026-09-20T11:30:54.925686457Z","published":"2026-09-17T16:09:49.121Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90427.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/86197679b293f0601c3331d545f99a70a7780aa9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d4d05f55e9da646ec03adfa77260eb46f4163749"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90427.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90427"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"918eb5c856f6ce4cf93b4b38e4b5e156905c5943"},{"fixed":"86197679b293f0601c3331d545f99a70a7780aa9"},{"fixed":"d4d05f55e9da646ec03adfa77260eb46f4163749"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90427.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90427.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}