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NVD / CVE Program· CNA Linux

CVE-2022-49912: btrfs: fix ulist leaks in error paths of qgroup self tests

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.20% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0a0dead4ad1a2e2a9bdf133ef45111d7c8daef84, 203204798831c35d855ecc6417d98267d2d2184b, 3f58283d83a588ff5da62fc150de19e798ed2ec2.

Low priority for now. Upgrade to Linux Linux 0a0dead4ad1a2e2a9bdf133ef45111d7c8daef84, 203204798831c35d855ecc6417d98267d2d2184b, 3f58283d83a588ff5da62fc150de19e798ed2ec2 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 ulist leaks in error paths of qgroup self tests In the test_no_shared_qgroup() and test_multiple_refs() qgroup self tests, if we fail to add the tree ref, remove the extent item or remove the extent ref, we are returning from the test function without freeing the "old_roots" ulist that was allocated by the previous calls to btrfs_find_all_roots(). Fix that by calling ulist_free() before returning.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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 kernel4.2 and later · before 4.9.333
  • linux linux kernel4.10 and later · before 4.14.299
  • linux linux kernel4.15 and later · before 4.19.265
  • linux linux kernel4.20 and later · before 5.4.224
  • linux linux kernel5.5 and later · before 5.10.154
  • linux linux kernel5.11 and later · before 5.15.78
  • linux linux kernel5.16 and later · before 6.0.8
  • linux linux kernel6.1

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

    • 4.2affected
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before d81370396025cf63a7a1b5f8bb25a3479203b2caaffected · git
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before 3f58283d83a588ff5da62fc150de19e798ed2ec2affected · git
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before 203204798831c35d855ecc6417d98267d2d2184baffected · git
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before 5d1a47ebf84540e40b5b43fc21aef0d6c0f627d9affected · git
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before 0a0dead4ad1a2e2a9bdf133ef45111d7c8daef84affected · git
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before f46ea5fa3320dca4fe0c0926b49a5f14cb85de62affected · git
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before da7003434bcab0ae9aba3f2c003e734cae093326affected · git
    • 442244c9633292a147ab2b29e7007a7c8a3909b2 and later · before d37de92b38932d40e4a251e876cc388f9aee5f42affected · git
    • before 4.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.8-16.0.8-1

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-2022-49910May 1, 2025 · Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu
    31Monitor
  • ← EarlierCVE-2022-49911May 1, 2025 · netfilter: ipset: enforce documented limit to prevent allocating huge memory
    22Monitor
  • Later →CVE-2022-49913May 1, 2025 · btrfs: fix inode list leak during backref walking at find_parent_nodes()
    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 Linux0a0dead4ad1a2e2a9bdf133ef45111d7c8daef84Vendor (CNA)
Linux Linux203204798831c35d855ecc6417d98267d2d2184bVendor (CNA)
Linux Linux3f58283d83a588ff5da62fc150de19e798ed2ec2Vendor (CNA)
Linux Linux5d1a47ebf84540e40b5b43fc21aef0d6c0f627d9Vendor (CNA)
Linux Linuxd37de92b38932d40e4a251e876cc388f9aee5f42Vendor (CNA)
Linux Linuxd81370396025cf63a7a1b5f8bb25a3479203b2caVendor (CNA)
Linux Linuxda7003434bcab0ae9aba3f2c003e734cae093326Vendor (CNA)
Linux Linuxf46ea5fa3320dca4fe0c0926b49a5f14cb85de62Vendor (CNA)
debian:linux6.0.8-1 · 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.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

CVSS:3.1/AV:L/AC:L/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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records