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CVE Record

CVE-2024-42296: f2fs: fix return value of f2fs_convert_inline_inode()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix return value of f2fs_convert_inline_inode() If device is readonly, make f2fs_convert_inline_inode() return EROFS instead of zero, otherwise it may trigger panic during writeback of inline inode's dirty page as below: f2fs_write_single_data_page+0xbb6/0x1e90 fs/f2fs/data.c:2888 f2fs_write_cache_pages fs/f2fs/data.c:3187 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3342 [inline] f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3369 do_writepages+0x359/0x870 mm/page-writeback.c:2634 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] file_write_and_wait_range+0x1aa/0x290 mm/filemap.c:788 f2fs_do_sync_file+0x68a/0x1ae0 fs/f2fs/file.c:276 generic_write_sync include/linux/fs.h:2806 [inline] f2fs_file_write_iter+0x7bd/0x24e0 fs/f2fs/file.c:4977 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux F2FS error-handling flaw can cause a kernel panic when an inline file is written back after its device becomes read-only. The documented consequence is system disruption. Exposure is limited to systems using F2FS under the relevant conditions; this is not described as a remotely exploitable flaw.

Executive priority

Treat as a high-priority targeted update for F2FS-dependent systems where a kernel panic could interrupt critical services. Broader emergency action is not supported by the supplied evidence because no remote path or active exploitation is documented.

Technical view

f2fs_convert_inline_inode() incorrectly returned success instead of EROFS for a read-only device. Subsequent writeback of the inline inode’s dirty page could reach F2FS data-page handling and panic the kernel. The supplied CVSS 3.1 score is 7.8 with local access, low complexity, low privileges, and no user interaction.

Likely exposure

Potentially exposed systems run a listed affected Linux version, use F2FS, and can encounter dirty inline-inode writeback while the underlying device is read-only. Systems not using F2FS are outside the documented trigger. The bundle’s version data includes an anomalous “0” entry, so packaged-kernel status requires vendor confirmation.

Exploitation context

The bundle marks this CVE as absent from KEV and provides no evidence of active exploitation or a public exploit. Its CVSS vector describes local, low-privileged access. The disclosed trigger is filesystem-state dependent, making this primarily a targeted local kernel stability and security concern rather than a remote attack path.

Researcher notes

The directly documented outcome is a writeback-triggered kernel panic caused by an incorrect success return. Although the CVSS vector assigns high confidentiality, integrity, and availability impacts, the supplied description does not explain confidentiality or integrity consequences. Exact affected package ranges and commit-to-release mappings remain incomplete in the bundle.

Mitigation direction

  • Update to a vendor-supported kernel containing the applicable cited stable fix.
  • Consult the Linux distribution or device vendor to map packaged kernels to the upstream fix.
  • Prioritize updates on systems actively using F2FS filesystems.
  • Restrict unnecessary local access on exposed systems until remediation is confirmed.
  • Reboot into the corrected kernel when required by the vendor’s update procedure.

Validation and detection

  • Inventory running kernel versions and identify systems actively using F2FS.
  • Check vendor advisories or changelogs for inclusion of an applicable cited fix commit.
  • Confirm the corrected kernel is running, not merely installed.
  • Review kernel logs for F2FS writeback failures or related kernel panics.
  • Reassess exposure if F2FS is disabled or absent from the system.
Prepared
Confidence
medium
Sources
7

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-2024-42296 mapping review

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Vulnerability profileCVE Program record
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

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.

1CVSS vectors
3Timeline events
2ADP providers
7Source links

SSVC decision data

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

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-42296Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
LinuxLinux98e4da8ca301e062d79ae168c67e56f3c3de3ce4, 98e4da8ca301e062d79ae168c67e56f3c3de3ce4, 98e4da8ca301e062d79ae168c67e56f3c3de3ce4, 98e4da8ca301e062d79ae168c67e56f3c3de3ce4, 98e4da8ca301e062d79ae168c67e56f3c3de3ce4unaffected
LinuxLinux3.8, 0, 5.15.165, 6.1.103, 6.6.44, 6.10.3, 6.11affected
Weakness

CWE details

No CWE listed

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