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CVE Record

CVE-2023-37454: An issue was discovered in the Linux kernel through 6.4.2.

An issue was discovered in the Linux kernel through 6.4.2. A crafted UDF filesystem image causes a use-after-free write operation in the udf_put_super and udf_close_lvid functions in fs/udf/super.c. NOTE: the suse.com reference has a different perspective about this.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This CVE describes a Linux kernel memory-safety bug triggered by a crafted UDF filesystem image. Business risk depends on whether systems can mount or process untrusted UDF media or images. The bundle provides no CVSS score and no KEV listing, so urgency should be based on exposure and vendor kernel status.

Executive priority

Treat this as exposure-driven kernel hygiene, not confirmed emergency exploitation. Prioritize internet-facing or user-accessible systems only if they process untrusted filesystem images; otherwise fold into normal kernel patch cycles with validation.

Technical view

Linux kernel versions through 6.4.2 are reported affected by a use-after-free write in fs/udf/super.c, involving udf_put_super and udf_close_lvid when handling a crafted UDF filesystem image. Public references include syzkaller reports, a kernel mailing-list thread, SUSE Bugzilla, and an upstream kernel commit.

Likely exposure

Most likely exposure is Linux systems that mount UDF filesystems from removable media, optical images, disk images, or other untrusted sources. Systems that never process UDF images have lower practical exposure, but kernel package status still needs verification.

Exploitation context

The provided sources describe a crafted filesystem image trigger. They do not cite active exploitation, and the CVE is not marked KEV in the supplied bundle. No source in the bundle proves remote exploitability or weaponized public exploitation.

Researcher notes

Evidence is strongest for a syzkaller-discovered kernel UDF bug and an upstream commit reference. The supplied bundle lacks CVSS, CWE, fixed-version range, and detailed SUSE rationale, so avoid broad claims beyond Linux kernel through 6.4.2 and crafted UDF image handling.

Mitigation direction

  • Check vendor advisories for kernels containing the referenced upstream fix or backport.
  • Prioritize kernel updates on systems that process removable media or disk images.
  • Restrict mounting or automated processing of untrusted UDF filesystem images.
  • Track SUSE guidance separately because the CVE notes a different perspective there.

Validation and detection

  • Inventory Linux hosts running kernel versions through 6.4.2.
  • Identify systems or workflows that mount UDF media or images.
  • Confirm installed kernel packages include the referenced upstream commit or vendor backport.
  • Review asset controls for removable media and untrusted filesystem-image handling.
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-2023-37454 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
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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