CVE-2026-90430

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90430", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.815Z", "datePublished": "2026-09-17T16:09:51.101Z", "dateUpdated": "2026-10-19T09:03:33.781Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:03:33.781Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/tegra241-cmdqv: Publish an LVCMDQ only after it is fully initialized\n\ntegra241_vintf_init_lvcmdq() stores the freshly allocated vcmdq pointer to\nthe vintf->lvcmdqs[] array, before tegra241_vcmdq_alloc_smmu_cmdq() builds\nthe vcmdq->cmdq. The error ISR dereferences that cmdq, so a latched LVCMDQ\nerror (e.g. one inherited across a kexec) firing in this window would make\ntegra241_vintf0_handle_error() pass the still-zeroed arm_smmu_cmdq down to\n__arm_smmu_cmdq_skip_err(), dereferencing NULL queue register pointers.\n\nDrop the store from tegra241_vintf_init_lvcmdq() and publish the vcmdq at\nthe end of the allocation instead, with an smp_store_release() that pairs\nwith an smp_load_acquire() in the ISR, which can see a fully built LVCMDQ\nor NULL.\n\nThe user-owned LVCMDQ allocation moves accordingly, publishing the vcmdq\nonce tegra241_vcmdq_hw_init_user() succeeds, using a plain store since a\nuser VINTF's lvcmdqs[] has no lockless reader -- the error ISR only walks\nthe VINTF0 array."}], "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": "d5ec248ee1c79354979c23f7f390e856e9535651", "status": "affected", "versionType": "git"}, {"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "lessThan": "792f720fc23fe5bd6508d40ed73ae739debd6dcb", "status": "affected", "versionType": "git"}, {"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "lessThan": "b4535b403d6bf9bcc24dbd62096711329b9c612c", "status": "affected", "versionType": "git"}, {"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "lessThan": "cbc41aacd49e695338940196e7084770365e1b68", "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": "6.12.111", "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": "6.12.111"}, {"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/d5ec248ee1c79354979c23f7f390e856e9535651"}, {"url": "https://git.kernel.org/stable/c/792f720fc23fe5bd6508d40ed73ae739debd6dcb"}, {"url": "https://git.kernel.org/stable/c/b4535b403d6bf9bcc24dbd62096711329b9c612c"}, {"url": "https://git.kernel.org/stable/c/cbc41aacd49e695338940196e7084770365e1b68"}], "title": "iommu/tegra241-cmdqv: Publish an LVCMDQ only after it is fully initialized", "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": "d5ec248ee1c79354979c23f7f390e856e9535651", "status": "affected", "version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "versionType": "git"}, {"lessThan": "792f720fc23fe5bd6508d40ed73ae739debd6dcb", "status": "affected", "version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "versionType": "git"}, {"lessThan": "b4535b403d6bf9bcc24dbd62096711329b9c612c", "status": "affected", "version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943", "versionType": "git"}, {"lessThan": "cbc41aacd49e695338940196e7084770365e1b68", "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": "6.12.111", "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: Publish an LVCMDQ only after it is fully initialized\n\ntegra241_vintf_init_lvcmdq() stores the freshly allocated vcmdq pointer to\nthe vintf->lvcmdqs[] array, before tegra241_vcmdq_alloc_smmu_cmdq() builds\nthe vcmdq->cmdq. The error ISR dereferences that cmdq, so a latched LVCMDQ\nerror (e.g. one inherited across a kexec) firing in this window would make\ntegra241_vintf0_handle_error() pass the still-zeroed arm_smmu_cmdq down to\n__arm_smmu_cmdq_skip_err(), dereferencing NULL queue register pointers.\n\nDrop the store from tegra241_vintf_init_lvcmdq() and publish the vcmdq at\nthe end of the allocation instead, with an smp_store_release() that pairs\nwith an smp_load_acquire() in the ISR, which can see a fully built LVCMDQ\nor NULL.\n\nThe user-owned LVCMDQ allocation moves accordingly, publishing the vcmdq\nonce tegra241_vcmdq_hw_init_user() succeeds, using a plain store since a\nuser VINTF's lvcmdqs[] has no lockless reader -- the error ISR only walks\nthe VINTF0 array."}], "id": "CVE-2026-90430", "lastModified": "2026-10-19T09:19:37.310", "metrics": {}, "published": "2026-09-17T17:17:47.997", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/792f720fc23fe5bd6508d40ed73ae739debd6dcb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b4535b403d6bf9bcc24dbd62096711329b9c612c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cbc41aacd49e695338940196e7084770365e1b68"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5ec248ee1c79354979c23f7f390e856e9535651"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[918eb5c856f6ce4cf93b4b38e4b5e156905c5943,792f720fc23fe5bd6508d40ed73ae739debd6dcb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[918eb5c856f6ce4cf93b4b38e4b5e156905c5943,b4535b403d6bf9bcc24dbd62096711329b9c612c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[918eb5c856f6ce4cf93b4b38e4b5e156905c5943,cbc41aacd49e695338940196e7084770365e1b68)"}}], "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": "semver", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-09-19T13:00:12.303739+00:00", "updated": "2026-09-19T15:00:11.752311+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}