194 lines
9.4 KiB
JSON
194 lines
9.4 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-2021-47446",
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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": "2024-05-21T14:58:30.832Z",
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"datePublished": "2024-05-22T06:19:38.839Z",
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"dateUpdated": "2026-08-05T08:47:49.798Z"
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},
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"containers": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:47:49.798Z"
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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/msm/a4xx: fix error handling in a4xx_gpu_init()\n\nThis code returns 1 on error instead of a negative error. It leads to\nan Oops in the caller. A second problem is that the check for\n\"if (ret != -ENODATA)\" cannot be true because \"ret\" is set to 1."
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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 bug is in drm/msm a4xx_gpu_init() during Adreno component bind, with the dangling GPU then used from local DRM open (msm_open→adreno_load_gpu) or the GPU IRQ handler—local device/ioctl paths only, not network or adjacent protocols.\nAC:L - On A4xx platforms with interconnects naming only gfx-mem (ocmem optional/-ENODATA), the buggy IS_ERR→ret=1 path runs deterministically at probe, frees the GPU, and falsely succeeds bind; a later DRM open or IRQ then uses the freed object with no race or layout outside attacker influence.\nPR:L - After the broken probe leaves a dangling GPU drvdata/IRQ cookie, an unprivileged local user or Android app that can open the MSM DRM/render node triggers adreno_load_gpu() on the freed object without real root or init-namespace admin rights.\nUI:N - The attacker opens the DRM device and drives the load path themselves; no separate victim action such as mounting media or opening a crafted file is required.\nS:U - Impact is a host-kernel UAF/oops within the same kernel authority; it is not a VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:H - The fail path kfree's the msm_gpu while platform drvdata and the IRQ handler still reference it, a use-after-free that per guidance enables reclaim/spray of the object and arbitrary kernel read primitives.\nI:H - Use of the freed gpu (including irq_handler calling gpu->funcs->irq and load/pm paths through dangling function pointers) is a classic UAF control-flow hijack primitive, scored Integrity High under kernel UAF guidance.\nA:H - Dereferencing ERR_PTR(1) as a gpu or using the freed msm_gpu causes a kernel oops/panic, which is full availability impact."
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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/msm/adreno/a4xx_gpu.c"
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],
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"drivers/gpu/drm/msm/adreno/a4xx_gpu.c"
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],
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{
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"version": "5.11",
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"status": "affected"
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{
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"version": "0",
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"lessThan": "5.11",
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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": "5.14.14",
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"lessThanOrEqual": "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",
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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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"title": "drm/msm/a4xx: fix error handling in a4xx_gpu_init()",
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"x_generator": {
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"content": {
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"timestamp": "2024-06-10T18:56:14.035808Z",
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"id": "CVE-2021-47446",
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"options": [
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"Exploitation": "none"
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