In the KGSL driver in Android releases from CAF using the linux kernel (Android for MSM, Firefox OS for MSM, QRD Android) before security patch level 2018-06-05, a reference counting error can lead to a Use After Free condition.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Link | Tags |
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https://www.codeaurora.org/security-bulletin/2018/07/02/july-2018-code-aurora-security-bulletin | third party advisory patch |
https://source.android.com/security/bulletin/2018-06-01#qualcomm-components | vendor advisory |
https://source.codeaurora.org/quic/la/kernel/msm-3.18/commit/?id=e3e13d745238ad8853af47c2d938344ea8d3c77f | third party advisory patch |