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CVE Record

CVE-2024-46841: btrfs: don't BUG_ON on ENOMEM from btrfs_lookup_extent_info() in walk_down_proc()

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't BUG_ON on ENOMEM from btrfs_lookup_extent_info() in walk_down_proc() We handle errors here properly, ENOMEM isn't fatal, return the error.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel Btrfs issue can turn a recoverable out-of-memory condition into a kernel BUG, potentially crashing the system. The business concern is service availability for systems using Btrfs, especially under memory pressure. The sources do not provide CVSS scoring or evidence of active exploitation.

Executive priority

Treat this as a targeted kernel availability risk, not a confirmed active exploitation emergency. Prioritize patching production Linux systems using Btrfs and rely on vendor kernel updates rather than custom workarounds.

Technical view

In Btrfs, walk_down_proc() incorrectly used BUG_ON when btrfs_lookup_extent_info() returned ENOMEM. The fix changes handling so ENOMEM is returned as a normal error. This is a kernel availability flaw tied to Btrfs code paths; exact exposure depends on kernel branch and distribution backports.

Likely exposure

Exposure is most likely on Linux systems using Btrfs with affected kernel versions or unpatched vendor kernels. Systems not using Btrfs are less likely to be practically exposed, but kernel package status should still be checked against vendor guidance.

Exploitation context

The source bundle does not indicate public exploitation, exploit code, or inclusion in CISA KEV. The plausible impact is denial of service through a kernel BUG under an ENOMEM condition, but the sources do not document real-world attack conditions.

Researcher notes

Evidence is limited to the CVE text, Linux stable commit references, and Debian LTS announcements. No CVSS, CWE, exploit status, or detailed affected range is provided in the bundle. Avoid assuming remote reachability or privilege requirements without vendor detail.

Mitigation direction

  • Update to a vendor kernel containing the referenced stable Btrfs fixes.
  • Follow Linux distribution advisories for backported kernel packages.
  • Apply Debian LTS kernel updates where Debian LTS systems are in scope.
  • Reboot systems after kernel updates so the fixed kernel is active.
  • Prioritize Btrfs hosts supporting production or availability-sensitive workloads.

Validation and detection

  • Inventory Linux hosts and identify those using Btrfs filesystems.
  • Record running kernel versions, not only installed package versions.
  • Compare kernel packages with vendor advisories and stable fix references.
  • For Debian LTS, check the cited March 2025 advisory coverage.
  • Confirm hosts booted into the patched kernel after maintenance.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-46841 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
9Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux2c47e605a91dde6b0514f689645e7ab336c8592a, 2c47e605a91dde6b0514f689645e7ab336c8592a, 2c47e605a91dde6b0514f689645e7ab336c8592a, 2c47e605a91dde6b0514f689645e7ab336c8592a, 2c47e605a91dde6b0514f689645e7ab336c8592a, 2c47e605a91dde6b0514f689645e7ab336c8592aunaffected
LinuxLinux2.6.31, 0, 5.10.231, 5.15.174, 6.1.120, 6.6.64, 6.10.10, 6.11affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.