{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74380","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.890Z","datePublished":"2026-08-15T05:58:57.706Z","dateUpdated":"2026-08-17T05:46:31.945Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T05:46:31.945Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Fix iommu_map_sgtable() return value check\n\nCommit \"iommu: return full error code from iommu_map_sg[_atomic]()\"\nchanged iommu_map_sgtable() to return an ssize_t and negative values\nin error cases, rather than a size_t and a zero.\n\npin_job() also was incorrectly assigning to 'int', which could cause\noverflows into negative values.\n\nUpdate pin_job() to correctly check for errors from iommu_map_sgtable."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is in host1x pin_job() reached from tegra DRM TEGRA_CHANNEL_SUBMIT ioctls on /dev/dri/renderD*, requiring local access to the GPU render node on Tegra/Jetson, automotive, and embedded platforms.\nAC:L - An attacker with render-node access can reliably submit host1x jobs and force iommu_map_sgtable() failures (e.g., via memory/IOVA pressure or alignment edge cases); no victim-controlled race or rare configuration is required.\nPR:L - Exploitation needs only unprivileged access to the DRM render node, which is commonly granted to local users and containerized GPU workloads on Tegra124+ systems with host1x IOMMU enabled; no real-root capability is required.\nUI:N - Triggering the flaw is fully programmatic through DRM ioctls and host1x job submission; no additional victim interaction such as plugging devices or mounting filesystems is needed.\nS:C - When iommu_map_sgtable() fails, the driver still programs host1x/GPU gather DMA with an IOVA lacking a valid IOMMU mapping, breaking the IOMMU/DMA isolation boundary between device DMA and system physical memory.\nC:H - Proceeding without a valid IOMMU translation lets host1x fetch gather/command streams via an unmapped IOVA, enabling GPU DMA reads outside the intended buffer and potential disclosure of unintended physical memory depending on SMMU fault behavior.\nI:H - Corrupted or attacker-influenced gather fetches can drive subsequent host1x client engines to perform unintended DMA writes; failed IOMMU setup removes the mapping that was meant to confine GPU memory access.\nA:H - Submitting jobs with unmapped IOVAs causes IOMMU faults, GPU/host1x hangs or timeouts, and potential kernel oops/panic on affected Tegra systems, yielding a repeatable local denial of service."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/host1x/job.c"],"versions":[{"version":"ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b","lessThan":"5f3985c2a500df3126cb12a2e0ccf26a40bc495d","status":"affected","versionType":"git"},{"version":"ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b","lessThan":"3ac173e46ef6fda9c9df8d47cdff4df962df9728","status":"affected","versionType":"git"},{"version":"ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b","lessThan":"2a68928c445138961e2c451983b473aeb3f5b999","status":"affected","versionType":"git"},{"version":"ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b","lessThan":"79240eee5a40014d9edfabe19f06b35ffa84e5f8","status":"affected","versionType":"git"},{"version":"ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b","lessThan":"e024c7993d839503d6c1f0044b8fc537c30300e9","status":"affected","versionType":"git"},{"version":"ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b","lessThan":"18f74762013a4b6aa6f905c4459e0f506f9c5c7b","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/gpu/host1x/job.c"],"versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"5.15","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5f3985c2a500df3126cb12a2e0ccf26a40bc495d"},{"url":"https://git.kernel.org/stable/c/3ac173e46ef6fda9c9df8d47cdff4df962df9728"},{"url":"https://git.kernel.org/stable/c/2a68928c445138961e2c451983b473aeb3f5b999"},{"url":"https://git.kernel.org/stable/c/79240eee5a40014d9edfabe19f06b35ffa84e5f8"},{"url":"https://git.kernel.org/stable/c/e024c7993d839503d6c1f0044b8fc537c30300e9"},{"url":"https://git.kernel.org/stable/c/18f74762013a4b6aa6f905c4459e0f506f9c5c7b"}],"title":"gpu: host1x: Fix iommu_map_sgtable() return value check","x_generator":{"engine":"bippy-1.2.0"}}}}