CVE-2026-90426

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90426", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.814Z", "datePublished": "2026-09-17T16:09:48.460Z", "dateUpdated": "2026-10-19T09:03:29.972Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:03:29.972Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"], "versions": [{"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "lessThan": "076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48", "status": "affected", "versionType": "git"}, {"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "lessThan": "735698e81f798b4c02dcb6291ffbdd1b962c8c66", "status": "affected", "versionType": "git"}, {"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "lessThan": "421f5ab135cd4a1353891e5bf2602cfc3c01afc7", "status": "affected", "versionType": "git"}, {"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "lessThan": "61f0d437988e5730b04442f6a7d30a9907339f2a", "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/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.12", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.3"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-90426", "lastModified": "2026-10-19T09:19:36.920", "metrics": {}, "published": "2026-09-17T17:17:47.353", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/421f5ab135cd4a1353891e5bf2602cfc3c01afc7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/61f0d437988e5730b04442f6a7d30a9907339f2a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/735698e81f798b4c02dcb6291ffbdd1b962c8c66"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[918eb5c856f6ce4cf93b4b38e4b5e156905c5943,076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[918eb5c856f6ce4cf93b4b38e4b5e156905c5943,735698e81f798b4c02dcb6291ffbdd1b962c8c66)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[918eb5c856f6ce4cf93b4b38e4b5e156905c5943,421f5ab135cd4a1353891e5bf2602cfc3c01afc7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[918eb5c856f6ce4cf93b4b38e4b5e156905c5943,61f0d437988e5730b04442f6a7d30a9907339f2a)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T06:00:09.682746+00:00", "updated": "2026-09-19T08:45:06.486403+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476", "CWE-416"]}