CVE-2026-64153

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The bug is reached only through local DRM interfaces on Qualcomm devices: MSM_GEM_SUBMIT and framebuffer/atomic display commits pin GEM buffers into the display or legacy kernel-managed GPU IOMMU domain via ioctl on /dev/dri/renderD* or /dev/dri/card*.\nAC:L - An attacker can reliably force iommu_map_sgtable() failures by exhausting IOMMU page-table space or memory through repeated GEM allocations and mapping operations they fully control, without depending on victim timing or uncontrollable layout.\nPR:L - Exploitation requires only unprivileged access to the DRM render/display node (DRM_RENDER_ALLOW ioctls); on Android phones any app with GPU access can trigger the mapping path without root or special capabilities.\nUI:N - No victim interaction is required beyond the attacker's own DRM/GPU or framebuffer operations; the vulnerable msm_iommu_map() runs during their own buffer pin/map requests.\nS:C - Incorrect handling of IOMMU mapping errors can leave the display engine or Adreno GPU operating on IOVAs without the intended translation, crossing the IOMMU/DMA security boundary between device DMA and system physical memory.\nC:H - If a failed IOMMU mapping is treated as successful, GPU or display DMA can read physical pages outside the intended buffer, enabling arbitrary physical memory disclosure; this is the same error-sign-conversion class that caused silent mapping failure in the parallel tegra fix.\nI:H - A successful-but-unmapped or mis-mapped IOVA lets the GPU (IOMMU_WRITE on typical buffers) or display write-back path corrupt physical memory outside the caller's GEM object, providing a DMA-based write primitive.\nA:H - Repeated IOMMU mapping failures mishandled on the display or GPU path can cause IOMMU fault storms, GPU hangs, display pipeline stalls, or kernel WARN/oops conditions during fault handling."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/msm/msm_iommu.c"], "versions": [{"version": "ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b", "lessThan": "3c2cdb7c07f664b77e2a75b50793b845d5742efa", "status": "affected", "versionType": "git"}, {"version": "ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b", "lessThan": "3e3c3c95ef4fe17231a9149e27bcfc9dae2dd89f", "status": "affected", "versionType": "git"}, {"version": "ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b", "lessThan": "7256e54583aee21e23929e7554278c2f5c1a08b1", "status": "affected", "versionType": "git"}, {"version": "ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b", "lessThan": "3457807aeb88077712f0a7cb65c3ca5120773d75", "status": "affected", "versionType": "git"}, {"version": "ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b", "lessThan": "f4e37f3df436c2bdd2621c21f9c72c8f149a221d", "status": "affected", "versionType": "git"}, {"version": "ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b", "lessThan": "3a45af37733446e114bf19b0209fe7d8089bdb8b", "status": "affected", "versionType": "git"}, {"version": "ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b", "lessThan": "55e0f0d1c1a4ee1e46da7da4d443eb3044fb3851", "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/drm/msm/msm_iommu.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3c2cdb7c07f664b77e2a75b50793b845d5742efa"}, {"url": "https://git.kernel.org/stable/c/3e3c3c95ef4fe17231a9149e27bcfc9dae2dd89f"}, {"url": "https://git.kernel.org/stable/c/7256e54583aee21e23929e7554278c2f5c1a08b1"}, {"url": "https://git.kernel.org/stable/c/3457807aeb88077712f0a7cb65c3ca5120773d75"}, {"url": "https://git.kernel.org/stable/c/f4e37f3df436c2bdd2621c21f9c72c8f149a221d"}, {"url": "https://git.kernel.org/stable/c/3a45af37733446e114bf19b0209fe7d8089bdb8b"}, {"url": "https://git.kernel.org/stable/c/55e0f0d1c1a4ee1e46da7da4d443eb3044fb3851"}], "title": "drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN", "x_generator": {"engine": "bippy-1.2.0"}}}}

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https://patchwork.freedesktop.org/patch/719685/"}], "id": "CVE-2026-64153", "lastModified": "2026-08-17T17:10:32.437", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-07-19T16:17:57.270", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3457807aeb88077712f0a7cb65c3ca5120773d75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3a45af37733446e114bf19b0209fe7d8089bdb8b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3c2cdb7c07f664b77e2a75b50793b845d5742efa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3e3c3c95ef4fe17231a9149e27bcfc9dae2dd89f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/55e0f0d1c1a4ee1e46da7da4d443eb3044fb3851"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7256e54583aee21e23929e7554278c2f5c1a08b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f4e37f3df436c2bdd2621c21f9c72c8f149a221d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN", "id": "2502509", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502509"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-253", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/msm: Fix iommu_map_sgtable() return value check and avoid WARN\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.\nStore the return value in the appropriate type and in case of error,\nreturn it rather than WARNing.\nPatchwork: https://patchwork.freedesktop.org/patch/719685/", "A flaw was found in the `drm/msm` (Direct Rendering Manager / Qualcomm MSM) driver within the Linux kernel. This vulnerability arises from an incorrect handling of return values in the `iommu_map_sgtable()` function. Previously, the function would trigger a warning instead of properly returning an error when an IOMMU (Input/Output Memory Management Unit) mapping operation failed. This could lead to system instability or unexpected behavior, potentially resulting in a denial of service."], "name": "CVE-2026-64153", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64153\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64153\nhttps://lore.kernel.org/linux-cve-announce/2026071932-CVE-2026-64153-812b@gregkh/T"], "threat_severity": "Low"}

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