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CVE-2021-39793 is a local privilege-escalation vulnerability in the ARM Mali GPU kernel driver used on Android. According to the provided Android bulletin text, the flaw is in kbase_jd_user_buf_pin_pages() in mali_kbase_mem.c and is caused by a logic error that results in a possible out-of-bounds write. Supporting content further attributes the issue to incorrect handling of Mali memory permission flags in that function, specifically write-related logic involving KBASE_REG_GPU_WR and KBASE_REG_CPU_WR, which can allow unauthorized writable access where it should not be permitted. In practical exploitation, this bug can be used by an unprivileged app to obtain a write primitive against otherwise read-only memory pages and then pivot to full privilege escalation on affected Android devices using Mali GPUs.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Mali GPU vulnerability referenced alongside CVE-2022-22706 in exploitation research on Android/aarch64 systems.
A Mali GPU driver privilege escalation vulnerability affecting Android devices, discussed alongside CVE-2022-22706 as enabling unprivileged apps to gain root access.
A Mali GPU driver vulnerability affecting Android devices that is discussed as enabling unprivileged apps to gain root access when exploited, including in exploit chains demonstrated against Pixel devices.
An Android GPU driver vulnerability that the content explicitly states was exploited in the wild.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.