What is CVE-2022-50766?

CVE-2022-50766 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.19 onward and patched in 5.15.75, 5.19.17, 6.0.3 and others. CVE-2022-50766 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-50766?

CVE-2022-50766 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2022-50766?

Yes, CVE-2022-50766 has been patched. Fixed versions include 5.15.75, 5.19.17, 6.0.3 and others. If you are running Linux kernel 4.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-50766 actively exploited?

CVE-2022-50766 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2022-50766

In the Linux kernel, the following vulnerability has been resolved: btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer syzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for commit bc877d285ca3dba2 ("btrfs: Deduplicate extent_buffer init code") missed that btrfs_set_header_generation() in btrfs_init_new_buffer() must not be moved to after clean_tree_block() because clean_tree_block() is calling btrfs_header_generation() since commit 55c69072d6bd5be1 ("Btrfs: Fix extent_buffer usage when nodesize != leafsize"). Since memzero_extent_buffer() will reset "struct btrfs_header" part, we can't move btrfs_set_header_generation() to before memzero_extent_buffer(). Just re-add btrfs_set_header_generation() before btrfs_clean_tree_block().

Package Linux Kernel

Published 2025-12-24

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 4.19 and later are affected. Fixed in 5.15.75, 5.19.17, 6.0.3, 6.1 and their respective stable series.

Affected from

≥ 4.19

Fixed in

✓ 5.15.75 5.15.x ✓ 5.19.17 5.19.x ✓ 6.0.3 6.0.x ✓ 6.1

References

The following references provide additional information about CVE-2022-50766 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0a408c6212c16b9a2a1141d3c531247582ef8101
Patch
Kernel patch commit
https://git.kernel.org/stable/c/89bc41c92d10b905c60f6ec13c9ef664a3555c54
Patch
Kernel patch commit
https://git.kernel.org/stable/c/a687c2890fe4a2acaac6941fa4097a1264d8f3eb
Patch

4 patch commits total View all on NVD

Frequently asked questions

What is CVE-2022-50766?

CVE-2022-50766 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.19 onward and has been patched in 5.15.75, 5.19.17, 6.0.3 and others. CVE-2022-50766 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2022-50766?

Yes — CVE-2022-50766 has been patched. Fixed versions include 5.15.75, 5.19.17, 6.0.3 and others. If you are running Linux kernel 4.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-50766 actively exploited?

No — CVE-2022-50766 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.