{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47446", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T14:58:30.832Z", "datePublished": "2024-05-22T06:19:38.839Z", "dateUpdated": "2026-08-05T08:47:49.798Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:47:49.798Z" }, "descriptions": [ { "lang": "en", "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." } ], "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 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." } ] } ], "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/a4xx_gpu.c" ], "versions": [ { "version": "5785dd7a8ef0de8049f40a1a109de6a1bf17b479", "lessThan": "3962d626eb3e3b23ebb2e2a61537fa764acbfe11", "status": "affected", "versionType": "git" }, { "version": "5785dd7a8ef0de8049f40a1a109de6a1bf17b479", "lessThan": "980d74e7d03ccf2eaa11d133416946bd880c7c08", "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/a4xx_gpu.c" ], "versions": [ { "version": "5.11", "status": "affected" }, { "version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.14.14", "lessThanOrEqual": "5.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15", "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": "5.11", "versionEndExcluding": "5.14.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3962d626eb3e3b23ebb2e2a61537fa764acbfe11" }, { "url": "https://git.kernel.org/stable/c/980d74e7d03ccf2eaa11d133416946bd880c7c08" } ], "title": "drm/msm/a4xx: fix error handling in a4xx_gpu_init()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-10T18:56:14.035808Z", "id": "CVE-2021-47446", "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": "2024-06-10T18:56:22.575Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.012Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/3962d626eb3e3b23ebb2e2a61537fa764acbfe11", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/980d74e7d03ccf2eaa11d133416946bd880c7c08", "tags": [ "x_transferred" ] } ] } ] } }