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CVE Record

CVE-2023-53683: fs: hfsplus: remove WARN_ON() from hfsplus_cat_{read,write}_inode()

In the Linux kernel, the following vulnerability has been resolved: fs: hfsplus: remove WARN_ON() from hfsplus_cat_{read,write}_inode() syzbot is hitting WARN_ON() in hfsplus_cat_{read,write}_inode(), for crafted filesystem image can contain bogus length. There conditions are not kernel bugs that can justify kernel to panic.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2023-53683 is a Linux kernel HFS+ filesystem issue where a crafted filesystem image with bogus length values could hit a warning path. In some configurations, kernel warnings can become system panics, creating a denial-of-service risk. The source bundle does not provide CVSS, CWE, or confirmed exploitation evidence.

Executive priority

Treat this as a targeted availability risk, not a confirmed widespread emergency. Prioritize patching workstations, forensic systems, media-processing hosts, and any Linux service that handles untrusted disk images. Standard kernel update cycles are appropriate unless HFS+ image handling is business-critical.

Technical view

The fix removes WARN_ON() from hfsplus_cat_read_inode() and hfsplus_cat_write_inode(). The CVE states syzbot found crafted HFS+ images could trigger these warnings because malformed on-disk lengths are input errors, not kernel invariants that justify panic. Impact depends on kernel configuration and whether untrusted HFS+ media or images are processed.

Likely exposure

Exposure is most plausible on Linux systems that mount or inspect untrusted HFS+ filesystem images, removable media, or disk images. Typical servers with no HFS+ use are less likely exposed. The provided version data is incomplete and should be mapped to distribution kernel advisories.

Exploitation context

The bundle reports syzbot discovery and crafted filesystem-image triggering. It does not cite public active exploitation, and KEV is false. No remote attack path is described. Practical abuse would likely require getting a vulnerable system to parse or mount a malicious HFS+ image.

Researcher notes

The CVE record lacks CVSS and CWE data, so severity relies on source description. The core issue is inappropriate WARN_ON handling for malformed HFS+ catalog inode data. Researchers should focus on version mapping, downstream backports, HFS+ reachability, and panic behavior rather than assuming memory corruption.

Mitigation direction

  • Update Linux kernels to vendor releases containing the referenced stable fixes.
  • Restrict mounting of untrusted HFS+ media or disk images.
  • Disable unnecessary automount workflows for removable or user-supplied media.
  • Check distribution advisories for exact fixed package versions.
  • Review panic-on-warning settings where service availability is critical.

Validation and detection

  • Inventory Linux kernel versions across affected systems.
  • Confirm whether HFS+ support is built in or loadable.
  • Identify systems that process user-supplied disk images or removable media.
  • Verify fixed stable commits or downstream patches are present.
  • Test only with benign validation in non-production environments.
Prepared
Confidence
medium
Sources
10

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.

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CVE-2023-53683 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
3Timeline events
0ADP providers
9Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxf62f5ee63052324ad94dd05091743d9e09f72070, ab778439c6fa0071698b62a351f79d319fd72c53, 781fa141414ef18b52f15037497155f80bf0ecab, 1f881d9201f6e0a917004a14329f9ff3d0bfa1e5, 48d9e2e6de01ed35e965eb549758a837c07b601d, 55d1cbbbb29e6656c662ee8f73ba1fc4777532eb, 55d1cbbbb29e6656c662ee8f73ba1fc4777532eb, 55d1cbbbb29e6656c662ee8f73ba1fc4777532eb, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87unaffected
LinuxLinux5.16, 0, 4.14.316, 4.19.284, 5.4.244, 5.10.181, 5.15.113, 6.1.30, 6.3.4, 6.4affected
Weakness

CWE details

No CWE listed

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