{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-54254", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-30T12:06:44.515Z", "datePublished": "2025-12-30T12:15:50.163Z", "dateUpdated": "2026-08-05T09:18:27.491Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:18:27.491Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/ttm: Don't leak a resource on eviction error\n\nOn eviction errors other than -EMULTIHOP we were leaking a resource.\nFix.\n\nv2:\n- Avoid yet another goto (Andi Shyti)" } ], "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 only through DRM ioctls (GEM create / command submission / buffer validation) on a local device node such as /dev/dri/renderD128. There is no network-facing consumer of ttm_bo_evict().\nAC:L - The attacker controls both preconditions: it fills VRAM/GTT with its own BOs to force the eviction path, then delivers a signal to its own ioctl thread so the interruptible wait inside the driver move callback returns -ERESTARTSYS, a non-EMULTIHOP error that leaks the resource. This is deterministic and can be repeated in a tight loop.\nPR:L - An ordinary unprivileged local user needs only an open FD on a DRM render node, which is granted to the render/video group on desktops, to every GPU-using app on Android and ChromeOS, and to containers with GPU passthrough. No capability or root access is involved.\nUI:N - The attacking process drives allocation, eviction and signal delivery entirely on its own. No action by any other user is required.\nS:U - The leaked resource, the dangling res->bo pointer, and all subsequent corruption remain within the kernel's own security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The orphaned ttm_resource retains a dangling res->bo to a freed ttm_buffer_object that later LRU walkers dereference without any validity check, giving a use-after-free whose freed-object contents the attacker can groom via heap spray to read kernel memory through the bo->base.resv / bo->bdev / bo->resource pointer chains.\nI:H - The same use-after-free yields write and control-flow primitives: ttm_bo_evict_swapout_allowable() calls dma_resv_trylock() through an attacker-controlled bo->base.resv pointer and indirect-calls bo->bdev->funcs->eviction_valuable() read from reclaimed slab memory.\nA:H - Each triggered error permanently leaks a VRAM/GTT range and an LRU entry, so repeated invocation exhausts GPU memory device-wide and denies service to all users including the display server; additionally the never-empty LRU makes ttm_resource_manager_evict_all() spin forever at suspend/unload, and the use-after-free crashes the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/ttm/ttm_bo.c" ], "versions": [ { "version": "403797925768d9fa870f5b1ebcd20016b397083b", "lessThan": "7738335d73d0686ec8995e0448e5d1b48cffb2a4", "status": "affected", "versionType": "git" }, { "version": "403797925768d9fa870f5b1ebcd20016b397083b", "lessThan": "e9c44738cb1f537b177cc1beabcf6913690460cd", "status": "affected", "versionType": "git" }, { "version": "403797925768d9fa870f5b1ebcd20016b397083b", "lessThan": "6aea0032380bbb1efebd598ad733d16925167921", "status": "affected", "versionType": "git" }, { "version": "403797925768d9fa870f5b1ebcd20016b397083b", "lessThan": "e8188c461ee015ba0b9ab2fc82dbd5ebca5a5532", "status": "affected", "versionType": "git" }, { "version": "6c68fbafb9cd13e13476043fd9f6e10f792f685a", "status": "affected", "versionType": "git" }, { "version": "5.14.6", "lessThan": "5.15", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/ttm/ttm_bo.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.124", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.43", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.5", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5", "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": "5.15.124" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.43" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.4.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7738335d73d0686ec8995e0448e5d1b48cffb2a4" }, { "url": "https://git.kernel.org/stable/c/e9c44738cb1f537b177cc1beabcf6913690460cd" }, { "url": "https://git.kernel.org/stable/c/6aea0032380bbb1efebd598ad733d16925167921" }, { "url": "https://git.kernel.org/stable/c/e8188c461ee015ba0b9ab2fc82dbd5ebca5a5532" } ], "title": "drm/ttm: Don't leak a resource on eviction error", "x_generator": { "engine": "bippy-1.2.0" } } } }