{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-57926", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-01-19T11:50:08.376Z", "datePublished": "2025-01-19T11:52:43.915Z", "dateUpdated": "2026-08-05T11:46:56.562Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:46:56.562Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Set private->all_drm_private[i]->drm to NULL if mtk_drm_bind returns err\n\nThe pointer need to be set to NULL, otherwise KASAN complains about\nuse-after-free. Because in mtk_drm_bind, all private's drm are set\nas follows.\n\nprivate->all_drm_private[i]->drm = drm;\n\nAnd drm will be released by drm_dev_put in case mtk_drm_kms_init returns\nfailure. However, the shutdown path still accesses the previous allocated\nmemory in drm_atomic_helper_shutdown.\n\n[ 84.874820] watchdog: watchdog0: watchdog did not stop!\n[ 86.512054] ==================================================================\n[ 86.513162] BUG: KASAN: use-after-free in drm_atomic_helper_shutdown+0x33c/0x378\n[ 86.514258] Read of size 8 at addr ffff0000d46fc068 by task shutdown/1\n[ 86.515213]\n[ 86.515455] CPU: 1 UID: 0 PID: 1 Comm: shutdown Not tainted 6.13.0-rc1-mtk+gfa1a78e5d24b-dirty #55\n[ 86.516752] Hardware name: Unknown Product/Unknown Product, BIOS 2022.10 10/01/2022\n[ 86.517960] Call trace:\n[ 86.518333] show_stack+0x20/0x38 (C)\n[ 86.518891] dump_stack_lvl+0x90/0xd0\n[ 86.519443] print_report+0xf8/0x5b0\n[ 86.519985] kasan_report+0xb4/0x100\n[ 86.520526] __asan_report_load8_noabort+0x20/0x30\n[ 86.521240] drm_atomic_helper_shutdown+0x33c/0x378\n[ 86.521966] mtk_drm_shutdown+0x54/0x80\n[ 86.522546] platform_shutdown+0x64/0x90\n[ 86.523137] device_shutdown+0x260/0x5b8\n[ 86.523728] kernel_restart+0x78/0xf0\n[ 86.524282] __do_sys_reboot+0x258/0x2f0\n[ 86.524871] __arm64_sys_reboot+0x90/0xd8\n[ 86.525473] invoke_syscall+0x74/0x268\n[ 86.526041] el0_svc_common.constprop.0+0xb0/0x240\n[ 86.526751] do_el0_svc+0x4c/0x70\n[ 86.527251] el0_svc+0x4c/0xc0\n[ 86.527719] el0t_64_sync_handler+0x144/0x168\n[ 86.528367] el0t_64_sync+0x198/0x1a0\n[ 86.528920]\n[ 86.529157] The buggy address belongs to the physical page:\n[ 86.529972] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000d46fd4d0 pfn:0x1146fc\n[ 86.531319] flags: 0xbfffc0000000000(node=0|zone=2|lastcpupid=0xffff)\n[ 86.532267] raw: 0bfffc0000000000 0000000000000000 dead000000000122 0000000000000000\n[ 86.533390] raw: ffff0000d46fd4d0 0000000000000000 00000000ffffffff 0000000000000000\n[ 86.534511] page dumped because: kasan: bad access detected\n[ 86.535323]\n[ 86.535559] Memory state around the buggy address:\n[ 86.536265] ffff0000d46fbf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[ 86.537314] ffff0000d46fbf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[ 86.538363] >ffff0000d46fc000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[ 86.544733] ^\n[ 86.551057] ffff0000d46fc080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[ 86.557510] ffff0000d46fc100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[ 86.563928] ==================================================================\n[ 86.571093] Disabling lock debugging due to kernel taint\n[ 86.577642] Unable to handle kernel paging request at virtual address e0e9c0920000000b\n[ 86.581834] KASAN: maybe wild-memory-access in range [0x0752049000000058-0x075204900000005f]\n..." } ], "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 MediaTek DRM driver is a local platform device with no network-facing surface; the dangling pointer is dereferenced from the local shutdown path (`reboot(2)`/`device_shutdown`), reachable only with local system access.\nAC:L - On an affected mt8188/mt8195 system where `mtk_drm_kms_init()` fails (e.g. firmware-drivers-only/`nomodeset` boot, missing OVL, or an allocation failure during probe), the secondary mmsys `private->drm` is stale from boot onward and the use-after-free is hit deterministically on every shutdown; the attacker only has to initiate a reboot, and the long window before shutdown lets them reliably groom the freed object.\nPR:L - An unprivileged local user can reach the shutdown path on typical deployments — logind/polkit lets any logged-in local user reboot without authentication on desktops/Chromebooks, and the same user can spray the freed kmalloc chunk beforehand.\nUI:N - No victim action is required; the attacker initiates the reboot themselves, and on affected systems the stale pointer is dereferenced automatically during normal shutdown.\nS:U - The use-after-free is in kernel memory and any resulting compromise stays within the kernel's own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The freed `drm_device` is reclaimable heap memory, and `drm_atomic_helper_shutdown()` reads pointers and list heads out of it; controlling the reclaimed contents yields an arbitrary-read primitive from the sprayed structure fields.\nI:H - `DRM_MODESET_LOCK_ALL_BEGIN` and `drm_atomic_helper_disable_all()` follow `mode_config` lists and make indirect calls through helper `funcs` pointers taken from the freed object, so a heap-sprayed reclaim gives control-flow hijack and arbitrary write.\nA:H - The reported failure is a KASAN use-after-free immediately followed by \"Unable to handle kernel paging request\" — a kernel panic on a wild address, which is a full availability loss." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/mediatek/mtk_drm_drv.c" ], "versions": [ { "version": "1ef7ed48356cd5f9af2b7671956991b658d8c2ba", "lessThan": "7083b93e9755d60f0c2bcaa9d064308108280534", "status": "affected", "versionType": "git" }, { "version": "1ef7ed48356cd5f9af2b7671956991b658d8c2ba", "lessThan": "078b2ff7da200b7532398e668eef723ad40fb516", "status": "affected", "versionType": "git" }, { "version": "1ef7ed48356cd5f9af2b7671956991b658d8c2ba", "lessThan": "36684e9d88a2e2401ae26715a2e217cb4295cea7", "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/mediatek/mtk_drm_drv.c" ], "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.72", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.10", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "6.4", "versionEndExcluding": "6.6.72" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7083b93e9755d60f0c2bcaa9d064308108280534" }, { "url": "https://git.kernel.org/stable/c/078b2ff7da200b7532398e668eef723ad40fb516" }, { "url": "https://git.kernel.org/stable/c/36684e9d88a2e2401ae26715a2e217cb4295cea7" } ], "title": "drm/mediatek: Set private->all_drm_private[i]->drm to NULL if mtk_drm_bind returns err", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-57926", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-11T15:40:53.635333Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-11T15:45:19.288Z" } } ] } }