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CVE-2020-12771

Description

An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails.

POC

Reference

- https://usn.ubuntu.com/4463-1/

- https://www.oracle.com/security-alerts/cpuApr2021.html

Github

No PoCs found on GitHub currently.