# CVE-2022-50379: linux: In the Linux kernel, the following vulnerability has been resolved:  btrfs: fix race between quota enable and quota r...

CVE-2022-50379 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50379, released September 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50379
- Priority: Routine
- CVSS: 4.7 (medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  btrfs: fix race between quota enable and quota rescan ioctl  When enabling quotas, at btrfs_quota_enable(), after committing the transaction, we change fs_info->quota_root to point to the quota root we created and set BTRFS_FS_QUOTA_ENABLED at fs_info->flags. Then we try to start the qgroup rescan worker, first by initializing it with a call to qgroup_rescan_init() - however if that fails we end up freeing the quota root but we leave fs_info->quota_root still pointing to it, this can later result in a use-after-free somewhere else.  We have previously set the flags BTRFS_FS_QUOTA_ENABLED and BTRFS_QGROUP_STATUS_FLAG_ON, so we can only fail with -EINPROGRESS at btrfs_quota_enable(), which is possible if someone already called the quota rescan ioctl, and therefore started the rescan worker.  So fix this by ignoring an -EINPROGRESS and asserting we can't get any other error.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.3-1 | [DEBIAN-CVE-2022-50379](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50379.md) | Sep 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.3-1 | [DEBIAN-CVE-2022-50379](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50379.md) | Sep 18, 2025 |
| Linux | linux Debian 14 | 6.0.3-1 | [DEBIAN-CVE-2022-50379](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50379.md) | Sep 18, 2025 |

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