CVE-2022-50379

MEDIUM EPSS 1.1%
Published Sep 18, 20259mo ago · Modified Jun 17, 20261w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Sep 18, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel* <4.19.262
linuxlinux_kernel*≥4.20  –  <5.4.220
linuxlinux_kernel*≥5.5  –  <5.10.150
linuxlinux_kernel*≥5.11  –  <5.15.75
linuxlinux_kernel*≥5.16  –  <5.19.17
linuxlinux_kernel*≥6.0  –  <6.0.3

References 7

  • git.kernel.org https://git.kernel.org/stable/c/0efd9dfc00d677a1d0929319a6103cb2dfc41c22
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/26b7c0ac49a3eea15559c9d84863736a6d1164b4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/331cd9461412e103d07595a10289de90004ac890
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/47b5ffe86332af95f0f52be0a63d4da7c2b37b55
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b996a3014ef014af8f97b60c35f5289210a4720
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6c22f86dd221eba0c7af645b1af73dcbc04ee27b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c97f6d528c3f1c83a6b792a8a7928c236c80b8fe
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0efd9dfc00d677a1d0929319a6103cb2dfc41c22
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/26b7c0ac49a3eea15559c9d84863736a6d1164b4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/331cd9461412e103d07595a10289de90004ac890
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/47b5ffe86332af95f0f52be0a63d4da7c2b37b55
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b996a3014ef014af8f97b60c35f5289210a4720
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6c22f86dd221eba0c7af645b1af73dcbc04ee27b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c97f6d528c3f1c83a6b792a8a7928c236c80b8fe
    Patch