Security readout for executives and security teams
Plain-English summary
A corrupted F2FS filesystem image can trigger a Linux kernel panic when the kernel removes a filesystem node. This can disrupt affected systems and may affect data being processed, but the supplied evidence demonstrates a crash rather than code execution.
Executive priority
Treat this as a high-priority availability risk for F2FS-dependent systems, especially shared or exposed hosts. Patch through supported kernel channels after normal testing. Systems that do not use F2FS are less likely to be exposed, but confirm configuration rather than assuming.
Technical view
A corrupted block address in an F2FS Node Address Table entry reaches truncate_node() without adequate validation. f2fs_invalidate_blocks() then encounters the invalid address and triggers a kernel BUG. The stable fixes add a sanity check before invalidation. CVSS 3.1 is 7.8 with local, low-privileged access and no user interaction.
Likely exposure
Exposure is concentrated in Linux systems using F2FS and capable of processing a corrupted F2FS image. The bundle lists affected release markers including 3.8, 6.6.64, 6.11.11, 6.12.2, and 6.13. Exact distribution exposure depends on downstream kernel backports.
Exploitation context
The issue was found by syzbot using a fuzzed filesystem image. It is not in the supplied KEV data, and the sources provide no evidence of active exploitation. The CVSS vector describes a local, low-privileged attack with low complexity; the demonstrated outcome is a kernel panic.
Researcher notes
CWE-754 reflects improper handling of exceptional conditions. The disclosed root cause is an unchecked corrupted NAT block address. The affected-version data contains repeated commit identifiers and unusual version markers, so it should not be treated as a definitive package matrix. No source establishes confidentiality or integrity exploitation beyond the CVSS assessment.
Mitigation direction
- Update to a supported vendor kernel containing the relevant F2FS stable fix.
- Confirm the fix through distribution advisories or kernel package changelogs.
- Restrict untrusted users and workloads from supplying or processing F2FS filesystem images.
- Prioritize systems where F2FS is enabled and service interruption has significant business impact.
Validation and detection
- Inventory kernel versions and identify systems that use or can mount F2FS.
- Check downstream kernel changelogs for the referenced stable commits or equivalent backports.
- Review kernel logs for F2FS invalid-block errors, BUG messages, or unexplained panics.
- Verify updated systems boot successfully and perform normal F2FS operations without regression.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-754: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-56692 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/27d6e7eff07f8cce8e83b162d8f21a07458c860dCVE reference, Linux
- https://git.kernel.org/stable/c/c1077078ce4589b5e5387f6b0aaa0d4534b9eb57CVE reference, Linux
- https://git.kernel.org/stable/c/0a5c8b3fbf6200f1c66062d307c9a52084917788CVE reference, Linux
- https://git.kernel.org/stable/c/6babe00ccd34fc65b78ef8b99754e32b4385f23dCVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Check for Unusual or Exceptional Conditions
Improper Check for Unusual or Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.