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CVE Record

CVE-2024-49968: ext4: filesystems without casefold feature cannot be mounted with siphash

In the Linux kernel, the following vulnerability has been resolved: ext4: filesystems without casefold feature cannot be mounted with siphash When mounting the ext4 filesystem, if the default hash version is set to DX_HASH_SIPHASH but the casefold feature is not set, exit the mounting.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel ext4 issue concerns an invalid filesystem configuration: siphash directory hashing without the ext4 casefold feature. The documented fix makes the kernel reject that mount. Business impact is most relevant where systems mount untrusted, removable, or appliance-provided ext4 filesystems.

Executive priority

Track through normal kernel patch management unless your environment mounts untrusted ext4 media or images. Prioritize affected operational technology, appliance, or forensic workflows where external filesystems are routinely mounted.

Technical view

CVE-2024-49968 is in ext4 mount handling. If an ext4 filesystem has default hash version DX_HASH_SIPHASH but lacks the casefold feature, the resolved behavior is to exit mounting. The bundle does not provide CVSS, CWE, crash details, privilege impact, or exploit mechanics.

Likely exposure

Exposure appears limited to Linux systems using affected kernel builds that mount ext4 filesystems with this specific metadata combination. Systems that never mount external or untrusted ext4 images likely have lower practical exposure.

Exploitation context

The source bundle does not show CISA KEV listing, active exploitation, public exploit code, or attacker prerequisites. Treat exploitation status as unconfirmed and avoid assuming remote exploitability from the available evidence.

Researcher notes

The strongest evidence is the upstream stable commit set and CVE description. Missing data includes CVSS, affected distribution mapping, concrete impact beyond mount rejection, and exploitability analysis. Do not infer broader kernel compromise from this bundle alone.

Mitigation direction

  • Apply vendor kernel updates that include the referenced stable ext4 fixes.
  • Check distribution or appliance advisories for packaged kernel availability.
  • Avoid mounting untrusted ext4 images on affected systems until updated.
  • For Siemens environments, review SSA-019113 for affected product guidance.

Validation and detection

  • Inventory Linux kernel versions and compare against vendor-fixed kernel packages.
  • Identify systems that mount removable, user-supplied, or appliance-supplied ext4 filesystems.
  • Confirm ext4-related fixes are present through vendor changelogs or kernel package metadata.
  • Review logs for failed ext4 mount attempts involving unusual filesystem images.
Prepared
Confidence
medium
Sources
8

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-2024-49968 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
7Source 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
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500unaffected
LinuxLinux5.13, 0, 5.15.198, 6.1.160, 6.6.120, 6.11.3, 6.12affected
Weakness

CWE details

No CWE listed

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