{"id":"CVE-2026-90426","revision":"5a49e24a68784971bbbe71d6ac45490b","records":[{"revision":"5a49e24a68784971bbbe71d6ac45490b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90426","aliases":[],"title":"iommu/tegra241-cmdqv: Free the error IRQ before tearing down VINTFs","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/tegra241-cmdqv: Free the error IRQ before tearing down VINTFs\n\ntegra241_cmdqv_remove() tears each VINTF down first, then calls free_irq().\nTearing a VINTF down frees vintf0 and clears cmdqv->vintfs[0]. An error in\nthat window makes tegra241_cmdqv_isr() read the stale slot and hand it to\ntegra241_vintf0_handle_error(), which dereferences a NULL or freed pointer.\n\nFree the IRQ before tearing the VINTFs down. free_irq() waits for in-flight\nhandlers to finish and blocks new ones, so no ISR can observe a VINTF as it\nis torn down.\n\nNote: a user-owned VINTF (viommu) could outlive this teardown, which unmaps\ncmdqv->base and frees cmdqv->vintfs, so a later viommu close then touches\nfreed memory. This is neither introduced nor fixed here: a physical IOMMU\nis not a pluggable device, so iommufd by design holds no reference on the\none behind a viommu, and this teardown is not expected while that viommu is\nstill alive.","state":0,"publishedAt":"2026-09-17T16:09:48.46+00:00","modifiedAt":"2026-10-19T09:03:29.972+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"918eb5c856f6ce4cf93b4b38e4b5e156905c5943\",\n                            \"lessThan\": \"076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"918eb5c856f6ce4cf93b4b38e4b5e156905c5943\",\n                            \"lessThan\": \"735698e81f798b4c02dcb6291ffbdd1b962c8c66\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"918eb5c856f6ce4cf93b4b38e4b5e156905c5943\",\n                            \"lessThan\": \"421f5ab135cd4a1353891e5bf2602cfc3c01afc7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"918eb5c856f6ce4cf93b4b38e4b5e156905c5943\",\n                            \"lessThan\": \"61f0d437988e5730b04442f6a7d30a9907339f2a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48","https://git.kernel.org/stable/c/735698e81f798b4c02dcb6291ffbdd1b962c8c66","https://git.kernel.org/stable/c/421f5ab135cd4a1353891e5bf2602cfc3c01afc7","https://git.kernel.org/stable/c/61f0d437988e5730b04442f6a7d30a9907339f2a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90426","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90426","identifiers":["CVE-2026-90426"]},"retained":false,"historicalAffected":[]}],"coverage":[]}