{"api_version":"1","generated_at":"2026-09-18T09:48:14+00:00","cve":"CVE-2026-90426","urls":{"html":"https://cve.report/CVE-2026-90426","api":"https://cve.report/api/cve/CVE-2026-90426.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90426","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90426"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:47","updated_at":"2026-09-17 17:17:47"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48","name":"https://git.kernel.org/stable/c/076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/735698e81f798b4c02dcb6291ffbdd1b962c8c66","name":"https://git.kernel.org/stable/c/735698e81f798b4c02dcb6291ffbdd1b962c8c66","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/61f0d437988e5730b04442f6a7d30a9907339f2a","name":"https://git.kernel.org/stable/c/61f0d437988e5730b04442f6a7d30a9907339f2a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/421f5ab135cd4a1353891e5bf2602cfc3c01afc7","name":"https://git.kernel.org/stable/c/421f5ab135cd4a1353891e5bf2602cfc3c01afc7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90426","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90426","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 735698e81f798b4c02dcb6291ffbdd1b962c8c66 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 421f5ab135cd4a1353891e5bf2602cfc3c01afc7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 61f0d437988e5730b04442f6a7d30a9907339f2a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48","status":"affected","version":"918eb5c856f6ce4cf93b4b38e4b5e156905c5943","versionType":"git"},{"lessThan":"735698e81f798b4c02dcb6291ffbdd1b962c8c66","status":"affected","version":"918eb5c856f6ce4cf93b4b38e4b5e156905c5943","versionType":"git"},{"lessThan":"421f5ab135cd4a1353891e5bf2602cfc3c01afc7","status":"affected","version":"918eb5c856f6ce4cf93b4b38e4b5e156905c5943","versionType":"git"},{"lessThan":"61f0d437988e5730b04442f6a7d30a9907339f2a","status":"affected","version":"918eb5c856f6ce4cf93b4b38e4b5e156905c5943","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:09:48.460Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48"},{"url":"https://git.kernel.org/stable/c/735698e81f798b4c02dcb6291ffbdd1b962c8c66"},{"url":"https://git.kernel.org/stable/c/421f5ab135cd4a1353891e5bf2602cfc3c01afc7"},{"url":"https://git.kernel.org/stable/c/61f0d437988e5730b04442f6a7d30a9907339f2a"}],"title":"iommu/tegra241-cmdqv: Free the error IRQ before tearing down VINTFs","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90426","datePublished":"2026-09-17T16:09:48.460Z","dateReserved":"2026-09-11T19:38:34.814Z","dateUpdated":"2026-09-17T16:09:48.460Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:47","lastModifiedDate":"2026-09-17 17:17:47","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90426","Ordinal":"1","Title":"iommu/tegra241-cmdqv: Free the error IRQ before tearing down VIN","CVE":"CVE-2026-90426","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90426","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"iommu/tegra241-cmdqv: Free the error IRQ before tearing down VIN"}]}}}