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NVD / CVE Program· CNA Linux

CVE-2026-45974: btrfs: fix invalid leaf access in btrfs_quota_enable() if ref key not found

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: 0.12% (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 023545e272f369d487e6a986c1e321c6e04be1da, 0761447f6f51e1c7997960d8e6559337deed6729, 1ee1d006c9fe4d6be5527ab1c84216b80cccbe40.

Low priority for now. Upgrade to Linux Linux 023545e272f369d487e6a986c1e321c6e04be1da, 0761447f6f51e1c7997960d8e6559337deed6729, 1ee1d006c9fe4d6be5527ab1c84216b80cccbe40 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 invalid leaf access in btrfs_quota_enable() if ref key not found If btrfs_search_slot_for_read() returns 1, it means we did not find any key greater than or equals to the key we asked for, meaning we have reached the end of the tree and therefore the path is not valid. If this happens we need to break out of the loop and stop, instead of continuing and accessing an invalid path.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 27, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 2th percentile
CWE
—

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 · 0.1%

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 kernel5.9.7 and later · before 5.10
  • linux linux kernel5.10.1 and later · before 5.10.252
  • linux linux kernel5.11 and later · before 5.15.202
  • linux linux kernel5.16 and later · before 6.1.165
  • linux linux kernel6.2 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.14
  • linux linux kernel6.19 and later · before 6.19.4
  • linux linux kernel5.10

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

    • ecce1be9f2a366990d0e75dd249fb324e83c34a9, 5.10affected
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before 023545e272f369d487e6a986c1e321c6e04be1daaffected · git
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before fd4913a53e3b54ad7e161847291439fe445d6356affected · git
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before b5b8ade9da452086e78f5d519b90d3769e354853affected · git
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before 1ee1d006c9fe4d6be5527ab1c84216b80cccbe40affected · git
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before 0761447f6f51e1c7997960d8e6559337deed6729affected · git
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before d7cf2314dd5e8661c05d076cd627eea9a7f76616affected · git
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before b2bd557b75b760e4b9d209112bda19314bd64558affected · git
    • 5223cc60b40ae525ae6c94e98824129f1a5b4ae5 and later · before ecb7c2484cfc83a93658907580035a8adf1e0a92affected · git
    • 5.9.7 and later · before 5.10affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.18.14-16.18.14-1

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-2026-45969May 27, 2026 · HID: playstation: Add missing check for input_ff_create_memless
    22Monitor
  • ← EarlierCVE-2026-45971May 27, 2026 · bpf: Limit bpf program signature size
    22Monitor
  • Later →CVE-2026-45975May 27, 2026 · ublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd
    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 Linux023545e272f369d487e6a986c1e321c6e04be1daVendor (CNA)
Linux Linux0761447f6f51e1c7997960d8e6559337deed6729Vendor (CNA)
Linux Linux1ee1d006c9fe4d6be5527ab1c84216b80cccbe40Vendor (CNA)
Linux Linux5.10Vendor (CNA)
Linux Linuxb2bd557b75b760e4b9d209112bda19314bd64558Vendor (CNA)
Linux Linuxb5b8ade9da452086e78f5d519b90d3769e354853Vendor (CNA)
Linux Linuxd7cf2314dd5e8661c05d076cd627eea9a7f76616Vendor (CNA)
Linux Linuxecb7c2484cfc83a93658907580035a8adf1e0a92Vendor (CNA)
Linux Linuxfd4913a53e3b54ad7e161847291439fe445d6356Vendor (CNA)
debian:linux6.1.170-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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)

—

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