{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-52987", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.376Z", "datePublished": "2026-06-24T16:29:01.633Z", "dateUpdated": "2026-08-05T12:32:23.544Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:32:23.544Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: avoid double drm_exec_fini() in userq validate\n\nWhen new_addition is true, amdgpu_userq_vm_validate() calls\ndrm_exec_fini(&exec) before iterating over the collected HMM ranges and\ncalling amdgpu_ttm_tt_get_user_pages().\n\nIf amdgpu_ttm_tt_get_user_pages() fails in that path, the code jumps to\nunlock_all and calls drm_exec_fini(&exec) a second time on the same\nexec object. drm_exec_fini() is not idempotent: it frees exec->objects\nand may also drop exec->contended and finalize the ww acquire context.\n\nRoute that error path directly to the range cleanup once exec has\nalready been finalized.\n\nIssue found using a prototype static analysis tool\nand confirmed by code review.\n\n(cherry picked from commit 2802952e4a07306da6ebe813ff1acacc5691851a)" } ], "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 - The vulnerable path is reached through AMDGPU DRM ioctls on a local DRM render/primary device, not through network, adjacent, or physical input.\nAC:L - A local attacker can create and map userptr-backed AMDGPU BOs and then trigger user queue VM validation; the failing `amdgpu_ttm_tt_get_user_pages()` path can be induced with attacker-controlled invalidated or unsuitable user memory.\nPR:L - The ioctl is registered with `DRM_AUTH|DRM_RENDER_ALLOW`, so a render-node client can reach it without root, DRM master, or real administrative capabilities.\nUI:N - No victim action is required after the local attacker runs the ioctl sequence.\nS:U - The corruption occurs inside the kernel driver and any resulting privilege escalation or crash remains within the same kernel security authority.\nC:H - The bug double-finalizes a `drm_exec`, causing use-after-free/double-free of kernel-managed objects; such memory corruption can reasonably be leveraged for kernel memory disclosure.\nI:H - The same use-after-free/double-free condition can corrupt allocator and object state, making arbitrary kernel memory modification or control-flow compromise defensible.\nA:H - Even without full exploitation, double-free/use-after-free in kernel cleanup paths can oops, panic, or otherwise crash the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c" ], "versions": [ { "version": "42f148788469792df207751e2339ef2bb8a1e33e", "lessThan": "c7c3ae7c01e5a0742b93cb9b40800bdd7f811e38", "status": "affected", "versionType": "git" }, { "version": "42f148788469792df207751e2339ef2bb8a1e33e", "lessThan": "508babf310365f1107a2e8831c267c292a286818", "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/amd/amdgpu/amdgpu_userq.c" ], "versions": [ { "version": "6.19", "status": "affected" }, { "version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "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": "6.19", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c7c3ae7c01e5a0742b93cb9b40800bdd7f811e38" }, { "url": "https://git.kernel.org/stable/c/508babf310365f1107a2e8831c267c292a286818" } ], "title": "drm/amdgpu: avoid double drm_exec_fini() in userq validate", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "affected": [ { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:10" ], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:6" ], "defaultStatus": "unknown", "packageName": "kernel", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "defaultStatus": "unaffected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "defaultStatus": "unaffected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "defaultStatus": "unaffected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "defaultStatus": "unaffected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "defaultStatus": "affected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat" } ], "datePublic": "2026-06-24T00:00:00.000Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in the Linux kernel. A double free vulnerability exists in the `drm/amdgpu` component within the `userq validate` function. This issue arises because the `drm_exec_fini()` function is called twice on the same execution object, which is not designed to be idempotent. An attacker could potentially exploit this to cause a denial of service or lead to unpredictable system behavior." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-1341", "description": "Multiple Releases of Same Resource or Handle", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-52987" }, { "name": "RHBZ#2492365", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492365" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52987.json" } ], "timeline": [ { "lang": "en", "time": "2026-06-24T00:00:00.000Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-06-24T00:00:00.000Z", "value": "Made public." } ], "title": "kernel: drm/amdgpu: avoid double drm_exec_fini() in userq validate", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-08-03T12:05:54.588Z" } } ] } }