{"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"]}]}]}}