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Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: Qualcomm components suffer from a **Resource Management Error**. Specifically, incorrect memory mapping during multi-process handling leads to **Use-After-Free** scenarios.β¦
π‘οΈ **Root Cause**: The flaw lies in **incorrect memory mapping** when processing multiple processes simultaneously. This leads to **Use-After-Free** vulnerabilities where memory is accessed after being released.β¦
π» **Attacker Capabilities**: With **Local** access and **Low** complexity, an attacker can achieve **High** impact. π― **Privileges**: Can likely execute arbitrary code or crash the system.β¦
π **Public Exploit**: Yes. A PoC is available on GitHub (TAKIANFIF) targeting **Qualcomm GPU / ARM Mali GPU**. π **Link**: https://github.com/TAKIANFIF/CVE-2021-1905-CVE-2021-1906-CVE-2021-28663-CVE-2021-28664.β¦
π **Self-Check**: Scan for the listed **Qualcomm chipsets** (e.g., APQ8009, MDM9607). π οΈ **Tools**: Use vulnerability scanners that check for Qualcomm Snapdragon component versions.β¦
β **Official Fix**: Yes. Qualcomm released a security bulletin in **May 2021**. π **Reference**: https://www.qualcomm.com/company/product-security/bulletins/may-2021-bulletin.β¦
π§ **No Patch Workaround**: Since it requires **Local** access, restrict physical and logical local access to the device. π **Mitigation**: Disable unnecessary multi-process services if possible.β¦