Security readout for executives and security teams
Plain-English summary
A Linux F2FS filesystem flaw can corrupt data when a compressed storage cluster is overwritten as a normal cluster and a checkpoint or sudden power loss interrupts the operation. Exploitation requires local access and specific filesystem activity; it is not described as a remote attack.
Executive priority
Treat as a high-priority integrity and availability issue for systems actively using compressed F2FS, especially shared or locally untrusted hosts. Other Linux systems can be triaged lower after confirming F2FS is absent. Schedule vendor-supported updates and ensure recoverable backups rather than treating this as an internet-wide emergency.
Technical view
F2FS released cp_rwsem while f2fs_write_raw_pages() handled a compressed-to-normal cluster overwrite. If only some blocks persisted before a checkpoint and sudden-power-off recovery, cluster metadata and data could become inconsistent because they were not updated atomically. The supplied CVSS v3.1 score is 7.8 with local, low-privilege access and no user interaction.
Likely exposure
Exposure is most likely on Linux systems using F2FS compression where local users or processes can trigger relevant writes. Systems not using F2FS, or not exercising compressed-cluster overwrites, are unlikely to encounter this specific flaw. The supplied version data is ambiguous, so confirm exposure through the kernel or distribution vendor.
Exploitation context
The supplied record does not identify active exploitation, and the CVE is not listed as KEV in the bundle. The CVSS vector indicates a local attack requiring low privileges, low complexity, and no user interaction. Evidence supports a conditional data-corruption risk, not a remotely exploitable compromise.
Researcher notes
The vulnerable behavior concerns atomicity across normal writes, checkpointing, and sudden-power-off recovery during compressed-cluster conversion. The source bundle provides six stable-kernel commits but does not clearly map each correction to its release line. It also provides no public exploit evidence, CWE classification, or reliable per-distribution package mapping.
Mitigation direction
- Apply a vendor-supported kernel update containing the applicable stable F2FS correction.
- Prioritize systems using F2FS compression or supporting untrusted local workloads.
- Check Linux distribution advisories for precise affected and corrected package versions.
- Maintain verified backups and recovery procedures for exposed F2FS data.
Validation and detection
- Identify systems mounting F2FS filesystems and determine whether compression is enabled.
- Record running kernel and package versions, then compare them with vendor advisories.
- Confirm the installed kernel includes the applicable referenced stable fix.
- After updating, verify the corrected kernel is running and filesystems mount normally.
- Review filesystem and kernel logs for corruption or recovery warnings.
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.
CVE-2024-27034 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
1 official scoreWe 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:H1.85.9LinuxVulnerability 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
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/7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416CVE reference, Linux
- https://git.kernel.org/stable/c/542c8b3c774a480bfd0804291a12f6f2391b0cd1CVE reference, Linux
- https://git.kernel.org/stable/c/75abfd61392b1db391bde6d738a30d685b843286CVE reference, Linux
- https://git.kernel.org/stable/c/2b1b14d9fc94b8feae20808684c8af28ec80f45bCVE reference, Linux
- https://git.kernel.org/stable/c/52982edfcefd475cc34af663d5c47c0cddaa5739CVE reference, Linux
- https://git.kernel.org/stable/c/fd244524c2cf07b5f4c3fe8abd6a99225c76544bCVE 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.