CVE-2018-9422

In get_futex_key of futex.c, there is a use-after-free due to improper locking. This could lead to local escalation of privilege with no additional privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-74250718 References: Upstream kernel.

Weakness

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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Potential Mitigations

References

• https://bugzilla.suse.com/show_bug.cgi?id=1102001\u0026_ga=2.244341506.661832603.1561012452-1774095668.1553066022
• https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
• https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
• https://source.android.com/security/bulletin/2018-07-01
• https://bugzilla.suse.com/show_bug.cgi?id=1102001\u0026_ga=2.244341506.661832603.1561012452-1774095668.1553066022
• https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
• https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
• https://source.android.com/security/bulletin/2018-07-01