CVE-2026-68260

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68260", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.378Z", "datePublished": "2026-08-10T12:01:34.414Z", "dateUpdated": "2026-08-17T05:01:52.352Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:01:52.352Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/imagination: acquire vm_ctx->lock before mapping memory to GPU VM\n\nThe drm gpuvm code doesn't protect find operation against map operation,\nand the driver needs to ensure a map operation shouldn't happen when a\nfind operation is in progress.\n\nIn some cases a find operation will be in progress when doing map/unmap\noperations, and the find operation will do a NULL pointer dereference.\n\nAn example of the stack trace of such NULL dereference is shown below:\n\n```\nUnable to handle kernel access to user memory without uaccess routines at\nvirtual address 0000000000000010\n\n[<ffffffff01e989d4>] drm_gpuva_find+0x28/0x6c [drm_gpuvm]\n[<ffffffff01ed3a40>] pvr_vm_unmap+0x34/0x68 [powervr]\n[<ffffffff01ec69da>] pvr_ioctl_vm_unmap+0x2e/0x50 [powervr]\n[<ffffffff8080ce0a>] drm_ioctl_kernel+0x8e/0xdc\n[<ffffffff8080d016>] drm_ioctl+0x1be/0x3e0\n[<ffffffff802bec3e>] __riscv_sys_ioctl+0xba/0xc4\n[<ffffffff80d858b2>] do_trap_ecall_u+0x23e/0x3f4\n[<ffffffff80d92288>] handle_exception+0x168/0x174\n```\n\nAs all occurences of drm_gpuva_find*() are already guarded by\nvm_ctx->lock, make pvr_vm_map() to acquire this lock to prevent\ndisturbing any find operation. This fixes the NULL deference problem in\ndrm_gpuva_find*()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Triggered through the DRM_IOCTL_PVR_VM_MAP/VM_UNMAP ioctls on the PowerVR render node (/dev/dri/renderD*), which requires local access to the device file; no network or physical path exists.\nAC:L - The attacker owns both sides of the race, issuing concurrent VM_MAP and VM_UNMAP ioctls from two threads on the same fd and vm_ctx handle, and can retry indefinitely with attacker-chosen mapping layouts that force split/remap (free) paths.\nPR:L - The ioctls are marked DRM_RENDER_ALLOW, so no DRM master, root, or capability is needed; any unprivileged process able to open the render node (world-accessible or graphics-group on Android/embedded PowerVR devices) can reach the code.\nUI:N - The attacker performs the entire sequence itself by opening the render node, creating a VM context and issuing concurrent map/unmap ioctls; no victim action is involved.\nS:U - The corruption stays within the kernel's own security authority on the affected host; no VM, IOMMU or sandbox boundary is crossed by the flaw itself.\nC:H - The unlocked map path frees drm_gpuva objects via pvr_vm_gpuva_remap()/pvr_vm_gpuva_unmap() while a concurrent find returns them, yielding a use-after-free whose reclaimed contents the attacker can groom to read kernel memory; racing MMU updates can also leave GPU page tables mapping unintended pages.\nI:H - The same use-after-free plus unsynchronized rb interval-tree insert/remove gives attacker-influenced writes through a freed/corrupted structure, and the racing pvr_mmu_map/unmap operations can corrupt GPU page tables, which is leveragable into arbitrary memory modification.\nA:H - The reported failure is an immediate kernel NULL pointer dereference in drm_gpuva_find(), and tree corruption or use-after-free reliably produces oopses, and the ioctl can be re-issued to crash the system at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/imagination/pvr_vm.c"], "versions": [{"version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "lessThan": "1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf", "status": "affected", "versionType": "git"}, {"version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "lessThan": "6253bb56bb2ebdf317d8b599ce737a2510cc2e17", "status": "affected", "versionType": "git"}, {"version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "lessThan": "15f58d44c24477a6ebffa44ec05207b81cfa55d9", "status": "affected", "versionType": "git"}, {"version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "lessThan": "17e2030f37600994440f875dc410615d5c66ee6d", "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/imagination/pvr_vm.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "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": "6.8", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf"}, {"url": "https://git.kernel.org/stable/c/6253bb56bb2ebdf317d8b599ce737a2510cc2e17"}, {"url": "https://git.kernel.org/stable/c/15f58d44c24477a6ebffa44ec05207b81cfa55d9"}, {"url": "https://git.kernel.org/stable/c/17e2030f37600994440f875dc410615d5c66ee6d"}], "title": "drm/imagination: acquire vm_ctx->lock before mapping memory to GPU VM", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/imagination/pvr_vm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf", "status": "affected", "version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "versionType": "git"}, {"lessThan": "6253bb56bb2ebdf317d8b599ce737a2510cc2e17", "status": "affected", "version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "versionType": "git"}, {"lessThan": "15f58d44c24477a6ebffa44ec05207b81cfa55d9", "status": "affected", "version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "versionType": "git"}, {"lessThan": "17e2030f37600994440f875dc410615d5c66ee6d", "status": "affected", "version": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/imagination/pvr_vm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.8"}, {"lessThan": "6.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.101", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.42", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\ndrm/imagination: acquire vm_ctx->lock before mapping memory to GPU VM\n\nThe drm gpuvm code doesn't protect find operation against map operation,\nand the driver needs to ensure a map operation shouldn't happen when a\nfind operation is in progress.\n\nIn some cases a find operation will be in progress when doing map/unmap\noperations, and the find operation will do a NULL pointer dereference.\n\nAn example of the stack trace of such NULL dereference is shown below:\n\n```\nUnable to handle kernel access to user memory without uaccess routines at\nvirtual address 0000000000000010\n\n[<ffffffff01e989d4>] drm_gpuva_find+0x28/0x6c [drm_gpuvm]\n[<ffffffff01ed3a40>] pvr_vm_unmap+0x34/0x68 [powervr]\n[<ffffffff01ec69da>] pvr_ioctl_vm_unmap+0x2e/0x50 [powervr]\n[<ffffffff8080ce0a>] drm_ioctl_kernel+0x8e/0xdc\n[<ffffffff8080d016>] drm_ioctl+0x1be/0x3e0\n[<ffffffff802bec3e>] __riscv_sys_ioctl+0xba/0xc4\n[<ffffffff80d858b2>] do_trap_ecall_u+0x23e/0x3f4\n[<ffffffff80d92288>] handle_exception+0x168/0x174\n```\n\nAs all occurences of drm_gpuva_find*() are already guarded by\nvm_ctx->lock, make pvr_vm_map() to acquire this lock to prevent\ndisturbing any find operation. This fixes the NULL deference problem in\ndrm_gpuva_find*()."}], "id": "CVE-2026-68260", "lastModified": "2026-08-17T05:18:28.340", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-10T13:20:14.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15f58d44c24477a6ebffa44ec05207b81cfa55d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/17e2030f37600994440f875dc410615d5c66ee6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6253bb56bb2ebdf317d8b599ce737a2510cc2e17"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: `drm/imagination` driver NULL pointer dereference leading to Denial of Service", "id": "2513347", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513347"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/imagination: acquire vm_ctx->lock before mapping memory to GPU VM\nThe drm gpuvm code doesn't protect find operation against map operation,\nand the driver needs to ensure a map operation shouldn't happen when a\nfind operation is in progress.\nIn some cases a find operation will be in progress when doing map/unmap\noperations, and the find operation will do a NULL pointer dereference.\nAn example of the stack trace of such NULL dereference is shown below:\n```\nUnable to handle kernel access to user memory without uaccess routines at\nvirtual address 0000000000000010\n[<ffffffff01e989d4>] drm_gpuva_find+0x28/0x6c [drm_gpuvm]\n[<ffffffff01ed3a40>] pvr_vm_unmap+0x34/0x68 [powervr]\n[<ffffffff01ec69da>] pvr_ioctl_vm_unmap+0x2e/0x50 [powervr]\n[<ffffffff8080ce0a>] drm_ioctl_kernel+0x8e/0xdc\n[<ffffffff8080d016>] drm_ioctl+0x1be/0x3e0\n[<ffffffff802bec3e>] __riscv_sys_ioctl+0xba/0xc4\n[<ffffffff80d858b2>] do_trap_ecall_u+0x23e/0x3f4\n[<ffffffff80d92288>] handle_exception+0x168/0x174\n```\nAs all occurences of drm_gpuva_find*() are already guarded by\nvm_ctx->lock, make pvr_vm_map() to acquire this lock to prevent\ndisturbing any find operation. This fixes the NULL deference problem in\ndrm_gpuva_find*().", "A flaw was found in the Linux kernel's `drm/imagination` driver. This vulnerability occurs because the graphics processing unit virtual memory (GPU VM) code does not properly synchronize `find` and `map/unmap` operations. A local attacker could exploit this timing issue by performing concurrent memory operations, leading to a NULL pointer dereference. This could result in a system crash, causing a Denial of Service (DoS)."], "name": "CVE-2026-68260", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-10T12:01:34Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68260\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68260\nhttps://git.kernel.org/stable/c/15f58d44c24477a6ebffa44ec05207b81cfa55d9\nhttps://git.kernel.org/stable/c/17e2030f37600994440f875dc410615d5c66ee6d\nhttps://git.kernel.org/stable/c/1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf\nhttps://git.kernel.org/stable/c/6253bb56bb2ebdf317d8b599ce737a2510cc2e17"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ff5f643de0bf27874c4033cd57a0bd034b5c7d11,1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ff5f643de0bf27874c4033cd57a0bd034b5c7d11,6253bb56bb2ebdf317d8b599ce737a2510cc2e17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ff5f643de0bf27874c4033cd57a0bd034b5c7d11,15f58d44c24477a6ebffa44ec05207b81cfa55d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ff5f643de0bf27874c4033cd57a0bd034b5c7d11,17e2030f37600994440f875dc410615d5c66ee6d)"}}], "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": "generic", "value": "6.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "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": "2026-08-10T14:45:18.123607+00:00", "updated": "2026-08-14T00:30:03.798555+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}