{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47535", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-24T15:02:54.826Z", "datePublished": "2024-05-24T15:09:43.994Z", "dateUpdated": "2026-08-05T08:48:16.665Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:48:16.665Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/a6xx: Allocate enough space for GMU registers\n\nIn commit 142639a52a01 (\"drm/msm/a6xx: fix crashstate capture for\nA650\") we changed a6xx_get_gmu_registers() to read 3 sets of\nregisters. Unfortunately, we didn't change the memory allocation for\nthe array. That leads to a KASAN warning (this was on the chromeos-5.4\nkernel, which has the problematic commit backported to it):\n\n BUG: KASAN: slab-out-of-bounds in _a6xx_get_gmu_registers+0x144/0x430\n Write of size 8 at addr ffffff80c89432b0 by task A618-worker/209\n CPU: 5 PID: 209 Comm: A618-worker Tainted: G W 5.4.156-lockdep #22\n Hardware name: Google Lazor Limozeen without Touchscreen (rev5 - rev8) (DT)\n Call trace:\n dump_backtrace+0x0/0x248\n show_stack+0x20/0x2c\n dump_stack+0x128/0x1ec\n print_address_description+0x88/0x4a0\n __kasan_report+0xfc/0x120\n kasan_report+0x10/0x18\n __asan_report_store8_noabort+0x1c/0x24\n _a6xx_get_gmu_registers+0x144/0x430\n a6xx_gpu_state_get+0x330/0x25d4\n msm_gpu_crashstate_capture+0xa0/0x84c\n recover_worker+0x328/0x838\n kthread_worker_fn+0x32c/0x574\n kthread+0x2dc/0x39c\n ret_from_fork+0x10/0x18\n\n Allocated by task 209:\n __kasan_kmalloc+0xfc/0x1c4\n kasan_kmalloc+0xc/0x14\n kmem_cache_alloc_trace+0x1f0/0x2a0\n a6xx_gpu_state_get+0x164/0x25d4\n msm_gpu_crashstate_capture+0xa0/0x84c\n recover_worker+0x328/0x838\n kthread_worker_fn+0x32c/0x574\n kthread+0x2dc/0x39c\n ret_from_fork+0x10/0x18" } ], "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 OOB write runs during GPU hang/fault crashstate capture reached via local MSM_GEM_SUBMIT on /dev/dri/renderD*; there is no network or adjacent-protocol path into a6xx_get_gmu_registers().\nAC:L - An attacker can reliably hang or fault the Adreno GPU with crafted submits, and DRM_MSM selects WANT_DEV_COREDUMP so crashstate capture (the vulnerable path) runs by default; the KASAN report confirms the OOB write is hit deterministically on recover_worker.\nPR:L - MSM_GEM_SUBMIT is DRM_RENDER_ALLOW with no root/CAP requirement; on msm/Adreno platforms (Android phones, ChromeOS) an unprivileged local user or app can open the render node and submit work.\nUI:N - The attacker submits hang-inducing or faulting GPU work themselves; no separate victim action is required.\nS:U - Impact is host-kernel slab corruption within the same OS security authority; this is not a VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:H - The slab out-of-bounds write of a6xx_gpu_state_obj fields into adjacent heap memory is memory corruption that can be leveraged for information disclosure per OOB-write guidance.\nI:H - Writing handle/data pointers past a 2-element gmu_registers allocation is a heap out-of-bounds write, enabling adjacent-object corruption and control-flow hijacking primitives.\nA:H - The documented KASAN slab-out-of-bounds write during recover_worker can oops/panic the kernel, so availability impact is High even without full exploitation." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c" ], "versions": [ { "version": "142639a52a01e90c512a9a8d2156997e02a65b53", "lessThan": "d646856a600e8635ba498f20b194219b158626e8", "status": "affected", "versionType": "git" }, { "version": "142639a52a01e90c512a9a8d2156997e02a65b53", "lessThan": "83e54fcf0b14ca2d869dd37abe1bb6542805f538", "status": "affected", "versionType": "git" }, { "version": "142639a52a01e90c512a9a8d2156997e02a65b53", "lessThan": "b4d25abf9720b69a03465b09d0d62d1998ed6708", "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/msm/adreno/a6xx_gpu_state.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.84", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.7", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16", "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": "5.9", "versionEndExcluding": "5.10.84" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8" }, { "url": "https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538" }, { "url": "https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708" } ], "title": "drm/msm/a6xx: Allocate enough space for GMU registers", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-787", "lang": "en", "description": "CWE-787 Out-of-bounds Write" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 6.2, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-17T17:34:34.685290Z", "id": "CVE-2021-47535", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-12-04T18:09:25.843Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.827Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708", "tags": [ "x_transferred" ] } ] } ] } }