{"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":"2026-09-21T13:15:23.757Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-21T13:15:23.757Z"},"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-rc1","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-rc1"}]}]}],"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"}}}}