{ "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" } } } }