4.7

CVE-2022-50379: btrfs: fix race between quota enable and quota rescan ioctl

Modified
AliasesUBUNTU-CVE-2022-50379DEBIAN-CVE-2022-50379
Published 18-09-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-50379 is a medium (CVSS 4.7) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.11%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
SUSE-SU-2025:03615-1SUSE-SU-2025:03628-1SUSE-SU-2025:3716-1SUSE-SU-2025:3761-1

Timeline

  1. 18-09-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.11% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu120 products
  • linuxAll versions (No fix recorded) | < 5.4.0-139.156 | < 5.15.0-60.66
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1096.104 | < 5.15.0-1030.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 5d23515be66904fa3b1b5d6bd72d2199cd2447ab, < c97f6d528c3f1c83a6b792a8a7928c236c80b8fe | ≥ 5d23515be66904fa3b1b5d6bd72d2199cd2447ab, < 26b7c0ac49a3eea15559c9d84863736a6d1164b4 | ≥ 5d23515be66904fa3b1b5d6bd72d2199cd2447ab, < 47b5ffe86332af95f0f52be0a63d4da7c2b37b55 | ≥ 5d23515be66904fa3b1b5d6bd72d2199cd2447ab, < 4b996a3014ef014af8f97b60c35f5289210a4720 | ≥ 5d23515be66904fa3b1b5d6bd72d2199cd2447ab, < 0efd9dfc00d677a1d0929319a6103cb2dfc41c22 | ≥ 5d23515be66904fa3b1b5d6bd72d2199cd2447ab, < 6c22f86dd221eba0c7af645b1af73dcbc04ee27b | ≥ 5d23515be66904fa3b1b5d6bd72d2199cd2447ab, < 331cd9461412e103d07595a10289de90004ac890 | 4.17
  • linux_kernel< 4.19.262 | ≥ 4.20, < 5.4.220 | ≥ 5.5, < 5.10.150 | ≥ 5.11, < 5.15.75 | ≥ 5.16, < 5.19.17 | ≥ 6.0, < 6.0.3
Debian1 product
  • linux< 6.0.3-1

3 vendors · 123 products

References

11 links
Show all 11 references