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NVD / CVE Program· CNA Linux

CVE-2024-46753: btrfs: handle errors from btrfs_dec_ref() properly

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: 0.26% (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 0e4840ae09f375381167000ce47424818fcbcc7c, 2c4fe45351e544da4b8f10c74b277117a4fa7869, 5eb178f373b4f16f3b42d55ff88fc94dd95b93b1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0e4840ae09f375381167000ce47424818fcbcc7c, 2c4fe45351e544da4b8f10c74b277117a4fa7869, 5eb178f373b4f16f3b42d55ff88fc94dd95b93b1 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: handle errors from btrfs_dec_ref() properly In walk_up_proc() we BUG_ON(ret) from btrfs_dec_ref(). This is incorrect, we have proper error handling here, return the error.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 18, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 17th 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%

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

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

Follow CVE-2024-46753

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 kernelbefore 5.10.236
  • linux linux kernel5.11 and later · before 5.15.180
  • linux linux kernel5.16 and later · before 6.1.134
  • linux linux kernel6.2 and later · before 6.6.87
  • linux linux kernel6.7 and later · before 6.10.10

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

    • 2.6.31affected
    • 2c47e605a91dde6b0514f689645e7ab336c8592a and later · before 0e4840ae09f375381167000ce47424818fcbcc7caffected · git
    • 2c47e605a91dde6b0514f689645e7ab336c8592a and later · before 2c4fe45351e544da4b8f10c74b277117a4fa7869affected · git
    • 2c47e605a91dde6b0514f689645e7ab336c8592a and later · before 9c8237021b53d52357c0de07a768582fafb2791daffected · git
    • 2c47e605a91dde6b0514f689645e7ab336c8592a and later · before 67e4ca7ddc67ef949326b4dc404a9678bbe67d72affected · git
    • 2c47e605a91dde6b0514f689645e7ab336c8592a and later · before a7f16a7a709845855cb5a0e080a52bda5873f9deaffected · git
    • 2c47e605a91dde6b0514f689645e7ab336c8592a and later · before 5eb178f373b4f16f3b42d55ff88fc94dd95b93b1affected · git
    • before 2.6.31not affected · semver
    • 5.10.236 and later · up to and including 5.10.*not affected · semver
    • 5.15.180 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:11linux-6.1before 6.1.137-1~deb11u16.1.137-1~deb11u1
Debian:12linuxbefore 6.1.135-16.1.135-1
Debian:13linuxbefore 6.10.11-16.10.11-1

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-2024-46751Sep 18, 2024 · btrfs: don't BUG_ON() when 0 reference count at btrfs_lookup_extent_info()
    22Monitor
  • ← EarlierCVE-2024-46752Sep 18, 2024 · btrfs: replace BUG_ON() with error handling at update_ref_for_cow()
    22Monitor
  • Later →CVE-2024-46754Sep 18, 2024 · bpf: Remove tst_run from lwt_seg6local_prog_ops.
    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 Linux0e4840ae09f375381167000ce47424818fcbcc7cVendor (CNA)
Linux Linux2c4fe45351e544da4b8f10c74b277117a4fa7869Vendor (CNA)
Linux Linux5eb178f373b4f16f3b42d55ff88fc94dd95b93b1Vendor (CNA)
Linux Linux67e4ca7ddc67ef949326b4dc404a9678bbe67d72Vendor (CNA)
Linux Linux9c8237021b53d52357c0de07a768582fafb2791dVendor (CNA)
Linux Linuxa7f16a7a709845855cb5a0e080a52bda5873f9deVendor (CNA)
debian:linux6.1.135-1 · Debian:12Package registry (OSV)
debian:linux-6.16.1.137-1~deb11u1 · Debian:11Package 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.

  • CVE-2023-2156498 days apartA flaw was found in the networking subsystem of the Linux kernel within the handling of the RPL protocol.
    32Monitor
  • CVE-2023-52621176 days apartbpf: Check rcu_read_lock_trace_held() before calling bpf map helpers
    31Monitor
  • CVE-2025-39803362 days apartscsi: ufs: core: Remove WARN_ON_ONCE() call from ufshcd_uic_cmd_compl()
    31Monitor
  • CVE-2024-4993233 days apartbtrfs: don't readahead the relocation inode on RST
    22Monitor
  • CVE-2024-4225141 days apartmm: page_ref: remove folio_try_get_rcu()
    22Monitor
  • CVE-2024-4225241 days apartclosures: Change BUG_ON() to WARN_ON()
    22Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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-617 · Reachable Assertion

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