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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.11% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 0efd9dfc00d677a1d0929319a6103cb2dfc41c22, 26b7c0ac49a3eea15559c9d84863736a6d1164b4, 331cd9461412e103d07595a10289de90004ac890.

Low priority for now. Upgrade to Linux Linux 0efd9dfc00d677a1d0929319a6103cb2dfc41c22, 26b7c0ac49a3eea15559c9d84863736a6d1164b4, 331cd9461412e103d07595a10289de90004ac890 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 4.7 · v3.1—No exploit Fix available
Published
Sep 18, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 1th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 4.19.262
  • linux linux kernel4.20 and later · before 5.4.220
  • linux linux kernel5.5 and later · before 5.10.150
  • linux linux kernel5.11 and later · before 5.15.75
  • linux linux kernel5.16 and later · before 5.19.17
  • linux linux kernel6.0 and later · before 6.0.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.17affected
    • 5d23515be66904fa3b1b5d6bd72d2199cd2447ab and later · before c97f6d528c3f1c83a6b792a8a7928c236c80b8feaffected · git
    • 5d23515be66904fa3b1b5d6bd72d2199cd2447ab and later · before 26b7c0ac49a3eea15559c9d84863736a6d1164b4affected · git
    • 5d23515be66904fa3b1b5d6bd72d2199cd2447ab and later · before 47b5ffe86332af95f0f52be0a63d4da7c2b37b55affected · git
    • 5d23515be66904fa3b1b5d6bd72d2199cd2447ab and later · before 4b996a3014ef014af8f97b60c35f5289210a4720affected · git
    • 5d23515be66904fa3b1b5d6bd72d2199cd2447ab and later · before 0efd9dfc00d677a1d0929319a6103cb2dfc41c22affected · git
    • 5d23515be66904fa3b1b5d6bd72d2199cd2447ab and later · before 6c22f86dd221eba0c7af645b1af73dcbc04ee27baffected · git
    • 5d23515be66904fa3b1b5d6bd72d2199cd2447ab and later · before 331cd9461412e103d07595a10289de90004ac890affected · git
    • before 4.17not affected · semver
    • 4.19.262 and later · up to and including 4.19.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.3-16.0.3-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-50376Sep 18, 2025 · orangefs: Fix kmemleak in orangefs_{kernel,client}_debug_init()
    22Monitor
  • ← EarlierCVE-2022-50378Sep 18, 2025 · drm/meson: reorder driver deinit sequence to fix use-after-free bug
    31Monitor
  • Later →CVE-2022-50380Sep 18, 2025 · mm: /proc/pid/smaps_rollup: fix no vma's null-deref
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0efd9dfc00d677a1d0929319a6103cb2dfc41c22Vendor (CNA)
Linux Linux26b7c0ac49a3eea15559c9d84863736a6d1164b4Vendor (CNA)
Linux Linux331cd9461412e103d07595a10289de90004ac890Vendor (CNA)
Linux Linux47b5ffe86332af95f0f52be0a63d4da7c2b37b55Vendor (CNA)
Linux Linux4b996a3014ef014af8f97b60c35f5289210a4720Vendor (CNA)
Linux Linux6c22f86dd221eba0c7af645b1af73dcbc04ee27bVendor (CNA)
Linux Linuxc97f6d528c3f1c83a6b792a8a7928c236c80b8feVendor (CNA)
debian:linux6.0.3-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records