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CVE-2020-25669

Description

A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.

POC

Reference

- http://www.openwall.com/lists/oss-security/2020/11/05/2

- http://www.openwall.com/lists/oss-security/2020/11/20/5

- https://www.openwall.com/lists/oss-security/2020/11/05/2%2C

- https://www.openwall.com/lists/oss-security/2020/11/05/2,

- https://www.openwall.com/lists/oss-security/2020/11/20/5%2C

- https://www.openwall.com/lists/oss-security/2020/11/20/5,

Github

No PoCs found on GitHub currently.