{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46215", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.105Z", "datePublished": "2026-05-28T09:40:32.050Z", "dateUpdated": "2026-08-05T12:30:33.895Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:30:33.895Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: Set old handle to NULL before prime swap in change_handle\n\nThere was a potential race condition in change_handle. The ioctl\nbriefly had a single object with two idr entries; a concurrent\ngem_close could delete the object and remove one of the handles\nwhile leaving the other one dangling, which could subsequently\nbe dereferenced for a use-after-free.\n\nTo fix this, do the same dance that gem_close itself does.\n(f6cd7daecff5 drm: Release driver references to handle before making it available again)\nFirst idr_replace the old handle to NULL. Later, if the prime\noperations are successful, actually close it.\n\ncreate_tail required a similar dance to avoid a similar problem.\n(bd46cece51a3 drm/gem: Fix race in drm_gem_handle_create_tail())\nIt idr_allocs the new handle with NULL, then swaps in the correct\nobject later to avoid races. We don't need to do that here, since\nthe only operations that could race are drm_prime, and\nchange_handle holds the prime lock for the entire duration.\n\nv2: cleanups of error paths" } ], "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 bug is reached only via the DRM_IOCTL_GEM_CHANGE_HANDLE ioctl on a local DRM device node (/dev/dri/renderD* or card*); there is no network or remote path to this code.\nAC:L - This is a race condition where the attacker controls both racing threads (one issuing GEM_CHANGE_HANDLE, another GEM_CLOSE on the same fd) and can retry the ioctls indefinitely, so the window is reliably winnable.\nPR:L - The ioctl is flagged DRM_RENDER_ALLOW with no DRM_AUTH/DRM_MASTER/DRM_ROOT_ONLY and no capability check, so any unprivileged local user with access to a DRM render node (standard on desktops/Android/kiosks) can trigger it.\nUI:N - The attacker drives the entire exploit through its own ioctls; no action by another user or victim is required.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; it does not cross a VM/hypervisor or IOMMU boundary.\nC:H - A use-after-free on a heap-allocated drm_gem_object lets the attacker reclaim the freed slot with controlled data and read back object contents/pointers, enabling kernel memory disclosure.\nI:H - The dangling idr entry is dereferenced (kref_get write, plus obj->funcs->* calls), and a reclaimed UAF object gives heap-spray-based arbitrary write and control-flow hijacking primitives.\nA:H - Dereferencing the freed/dangling GEM object reliably causes kernel oops/panic, a full 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/drm/drm_gem.c" ], "versions": [ { "version": "53096728b8910c6916ecc6c46a5abc5c678b58d9", "lessThan": "672464dd53231509c9c771110798c56d4660e19e", "status": "affected", "versionType": "git" }, { "version": "53096728b8910c6916ecc6c46a5abc5c678b58d9", "lessThan": "61bd96d3e5472c253f9c1ab77608f0c8aaa9d025", "status": "affected", "versionType": "git" }, { "version": "53096728b8910c6916ecc6c46a5abc5c678b58d9", "lessThan": "5e28b7b94408897e41c63477aabc9e1db439bc8c", "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/drm_gem.c" ], "versions": [ { "version": "6.18", "status": "affected" }, { "version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.32", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.9", "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": "6.18", "versionEndExcluding": "6.18.32" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/672464dd53231509c9c771110798c56d4660e19e" }, { "url": "https://git.kernel.org/stable/c/61bd96d3e5472c253f9c1ab77608f0c8aaa9d025" }, { "url": "https://git.kernel.org/stable/c/5e28b7b94408897e41c63477aabc9e1db439bc8c" } ], "title": "drm: Set old handle to NULL before prime swap in change_handle", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "references": [ { "url": "https://github.com/0xCyberstan/CVE-2026-46215-POC", "tags": [ "exploit" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-07-09T00:00:00+00:00", "options": [ { "Exploitation": "poc" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-46215" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-10T03:55:46.719Z" } } ] } }