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vuln-cve/data/2021/47xxx/CVE-2021-47535.json
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{
"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"
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]
},
{
"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"
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{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.9",
"versionEndExcluding": "5.16"
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"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"
}
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"title": "drm/msm/a6xx: Allocate enough space for GMU registers",
"x_generator": {
"engine": "bippy-1.2.0"
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"adp": [
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"problemTypes": [
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"descriptions": [
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"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"
}
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"shortName": "CVE",
"dateUpdated": "2024-08-04T05:39:59.827Z"
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"title": "CVE Program Container",
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"tags": [
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"tags": [
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