CVE-2021-47535

{"id": "CVE-2021-47535", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"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"}, "impactScore": 3.6, "exploitabilityScore": 2.5}]}, "published": "2024-05-24T15:15:17.120", "references": [{"url": "https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-787"}]}], "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"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm/msm/a6xx: asigne suficiente espacio para los registros GMU. En el commit 142639a52a01 (\"drm/msm/a6xx: corrija la captura del estado de falla para A650\") cambiamos a6xx_get_gmu_registers() para que diga 3 conjuntos de registros. Desafortunadamente, no cambiamos la asignaci\u00f3n de memoria para la matriz. Eso conduce a una advertencia de KASAN (esto estaba en el kernel chromeos-5.4, que tiene el commit problem\u00e1tica respaldada): ERROR: KASAN: slab-out-of-bounds in _a6xx_get_gmu_registers+0x144/0x430 Escritura de tama\u00f1o 8 en addr ffffff80c89432b0 por tarea A618-worker/209 CPU: 5 PID: 209 Comm: A618-worker Contaminado: GW 5.4.156-lockdep #22 Nombre del hardware: Google Lazor Limozeen sin pantalla t\u00e1ctil (rev5 - rev8) (DT) Rastreo de llamadas: dump_backtrace+0x0 /0x248 show_stack+0x20/0x2c dump_stack+0x128/0x1ec print_address_description+0x88/0x4a0 __kasan_report+0xfc/0x120 kasan_report+0x10/0x18 __asan_report_store8_noabort+0x1c/0x24 _a6xx_get_gmu_registers +0x144/0x430 a6xx_gpu_state_get+0x330/0x25d4 msm_gpu_crashstate_capture+0xa0/0x84c recovery_worker+0x328 /0x838 kthread_worker_fn+0x32c/0x574 kthread+0x2dc/0x39c ret_from_fork+0x10/0x18 Asignado por la tarea 209: __kasan_kmalloc+0xfc/0x1c4 kasan_kmalloc+0xc/0x14 kmem_cache_alloc_trace+0x1f0/0x 2a0 a6xx_gpu_state_get+0x164/0x25d4 msm_gpu_crashstate_capture+0xa0/0x84c recovery_worker+0x328 /0x838 kthread_worker_fn+0x32c/0x574 kthread+0x2dc/0x39c ret_from_fork+0x10/0x18"}], "lastModified": "2025-04-01T18:41:14.890", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5DA1596A-37A3-44A8-8924-2C739062B649", "versionEndExcluding": "5.10.84", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A696A60B-2782-4119-83DD-1EFFBC903F02", "versionEndExcluding": "5.15.7", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F621B5E3-E99D-49E7-90B9-EC3B77C95383"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}