180 lines
9.7 KiB
JSON
180 lines
9.7 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-53844",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-09T01:27:17.827Z",
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"datePublished": "2025-12-09T01:30:06.863Z",
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"dateUpdated": "2026-08-05T09:16:22.259Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:16:22.259Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/ttm: Don't leak a resource on swapout move error\n\nIf moving the bo to system for swapout failed, we were leaking\na resource. Fix."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable path is reached only through local access to a DRM device node (/dev/dri/renderD* or card*) via GEM allocation/submission ioctls that drive TTM swapout; there is no network-facing component.\nAC:L - The attacker controls both preconditions — swapout is forced deterministically by allocating TTM pages past ttm_pages_limit (ttm_tt_populate loops on ttm_global_swapout), and the move failure is forced by keeping the GTT BO's fences unsignaled past the 15-second ttm_bo_wait_ctx timeout in amdgpu/radeon/nouveau, or by inducing -ENOMEM in dma_resv_reserve_fences under the same memory pressure. The sequence is repeatable at will, leaking one dangling resource per attempt.\nPR:L - Requires only an open DRM render node, which is granted to any logged-in desktop user, Android graphics-group app, or container with /dev/dri passed through; no capabilities and no root are needed.\nUI:N - The attacker performs all steps itself — BO allocation, GPU submission and memory pressure — with no action from any other user or victim process.\nS:U - The corruption is confined to the kernel's own TTM resource-manager structures within the same security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - The orphaned ttm_resource stays linked on the SYSTEM manager's LRU with a stale res->bo, so ttm_device_swapout, ttm_mem_evict_first and ttm_lru_bulk_move_tail read from a freed ttm_buffer_object whose slab the attacker can groom — a controllable use-after-free read primitive into kernel memory.\nI:H - The same dangling entry yields writes: ttm_bo_get_unless_zero performs an atomic increment into the freed object, list_del_init/list_bulk_move_tail splice attacker-influenced LRU pointers, and a groomed fake BO reaches the bo->bdev->funcs->swap_notify() and bo->destroy indirect calls, giving control-flow hijack potential.\nA:H - Beyond the unbounded kernel memory and man->usage accounting leak, the stale LRU entry oopses on the next swapout or eviction walk, and ttm_device_clear_lru_dma_mappings spins forever on it while holding bdev->lru_lock (kref_get_unless_zero fails, then continue without list_del_init), producing a soft lockup and system hang."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/ttm/ttm_bo.c"
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],
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"versions": [
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{
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"version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
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"lessThan": "af4e0ce2af8a8f0ff3b89702a1e18d8ec2c4a834",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
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"lessThan": "f037f6038736bd038ddb9c72de979a08cc1ee3b5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
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"lessThan": "4a5b37ea6797d7a53e6dd004aa37e149f40199ce",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
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"lessThan": "a590f03d8de7c4cb7ce4916dc7f2fd10711faabe",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/ttm/ttm_bo.c"
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],
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"versions": [
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{
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"version": "5.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.121",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.40",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.4.5",
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"lessThanOrEqual": "6.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.5",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "5.15.121"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.1.40"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.4.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.5"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/af4e0ce2af8a8f0ff3b89702a1e18d8ec2c4a834"
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},
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{
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"url": "https://git.kernel.org/stable/c/f037f6038736bd038ddb9c72de979a08cc1ee3b5"
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},
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{
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"url": "https://git.kernel.org/stable/c/4a5b37ea6797d7a53e6dd004aa37e149f40199ce"
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},
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{
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"url": "https://git.kernel.org/stable/c/a590f03d8de7c4cb7ce4916dc7f2fd10711faabe"
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}
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],
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"title": "drm/ttm: Don't leak a resource on swapout move error",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |