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CVE Record

CVE-2024-35935: btrfs: send: handle path ref underflow in header iterate_inode_ref()

In the Linux kernel, the following vulnerability has been resolved: btrfs: send: handle path ref underflow in header iterate_inode_ref() Change BUG_ON to proper error handling if building the path buffer fails. The pointers are not printed so we don't accidentally leak kernel addresses.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel Btrfs issue in the send path. The public description says a failure while building a path buffer could hit a kernel BUG condition instead of returning an error. Business urgency depends on whether affected Linux kernels and Btrfs send are used.

Executive priority

Schedule this into normal kernel patching unless Btrfs is business-critical or exposed in managed appliance environments. Escalate priority for systems where kernel crashes would affect production availability.

Technical view

The flaw is in Btrfs send, specifically iterate_inode_ref(). The fix replaces BUG_ON behavior with normal error handling when path buffer construction fails, and avoids printing pointers to prevent accidental kernel address leakage. The bundle does not provide CVSS, CWE, or detailed attacker prerequisites.

Likely exposure

Exposure is most likely on Linux systems running affected kernel versions with Btrfs functionality, especially where Btrfs send is used. Distribution package status must be checked because the bundle lists upstream stable commits and Debian LTS advisories, not every vendor kernel.

Exploitation context

The bundle does not cite active exploitation, and KEV is false. No exploit details, public proof-of-concept status, or attacker access requirements are provided. Treat this as a kernel reliability and hardening issue until vendor guidance gives clearer impact.

Researcher notes

Evidence is limited to the CVE description, upstream stable references, and Debian LTS advisories. The source bundle names no CVSS score, CWE, exploit activity, or precise attacker model. Avoid assuming remote exploitability or privilege escalation without vendor evidence.

Mitigation direction

  • Apply vendor kernel updates that include the referenced stable Btrfs fixes.
  • Check Debian LTS advisories if using Debian-based long-term support systems.
  • Prioritize hosts using Btrfs send or Btrfs-backed operational workflows.
  • If no package fix is available, follow your Linux vendor's mitigation guidance.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and images.
  • Identify systems using Btrfs filesystems or Btrfs send workflows.
  • Compare installed kernels against vendor advisories and fixed package versions.
  • Confirm patched kernels are booted, not only installed.
Prepared
Confidence
medium
Sources
12

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-2024-35935 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
3ADP providers
12Source 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux31db9f7c23fbf7e95026143f79645de6507b583b, 31db9f7c23fbf7e95026143f79645de6507b583b, 31db9f7c23fbf7e95026143f79645de6507b583b, 31db9f7c23fbf7e95026143f79645de6507b583b, 31db9f7c23fbf7e95026143f79645de6507b583b, 31db9f7c23fbf7e95026143f79645de6507b583b, 31db9f7c23fbf7e95026143f79645de6507b583b, 31db9f7c23fbf7e95026143f79645de6507b583bunaffected
LinuxLinux3.6, 0, 4.19.312, 5.4.274, 5.10.215, 5.15.155, 6.1.86, 6.6.27, 6.8.6, 6.9affected
Weakness

CWE details

No CWE listed

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