CVE-2022-50300: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map use-after-free when handling missing device in read_one_chunk Store the error code before freeing the extent_map. Though it's reference counted structure, in that function it's the first and last allocation so this would lead to a potential use-after-free. The error can happen eg. when chunk is stored on a missing device and the degraded mount option is missing. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721

Affected products

• Linux Linux Kernel: from 4.15, before 5.15.87 (fixed in 5.15.87); from 5.16, before 6.0.18 (fixed in 6.0.18); from 6.1, before 6.1.4 (fixed in 6.1.4)

Published 2025-09-15. Last modified 2026-08-04.