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CVE Record

CVE-2023-53568: s390/zcrypt: don't leak memory if dev_set_name() fails

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: don't leak memory if dev_set_name() fails When dev_set_name() fails, zcdn_create() doesn't free the newly allocated resources. Do it.

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 issue is a memory leak in the s390/zcrypt component when device naming fails during creation. The public record does not provide a CVSS score, CWE, impact rating, or exploitation evidence. Business urgency is mainly for organizations running affected Linux kernels on relevant s390/zcrypt-capable systems.

Executive priority

Treat this as a targeted kernel hygiene item, not an emergency based on current evidence. Prioritize affected mainframe or s390-related Linux environments, fold remediation into normal kernel patch cycles, and escalate only if vendor advisories assign higher severity.

Technical view

The resolved defect is in zcdn_create(): if dev_set_name() fails, newly allocated resources were not freed. Kernel stable commits are listed as references. The source bundle identifies affected Linux kernel versions and commit identifiers, but does not describe privilege requirements, triggerability, or security impact beyond the memory leak.

Likely exposure

Exposure appears limited to Linux kernels containing the affected s390/zcrypt code paths, especially versions listed in the CVE bundle. Organizations without relevant Linux kernel versions or s390/zcrypt usage are less likely to be exposed, but the bundle does not provide CPEs or distribution-specific package mappings.

Exploitation context

No active exploitation is supported by the supplied sources. The CVE is not marked KEV, and the bundle contains no exploit reports, proof-of-concept references, or weaponization details. Exploitability remains unclear from the provided public record.

Researcher notes

The key evidence is the concise kernel fix description: zcdn_create() failed to free allocated resources when dev_set_name() failed. Missing data includes CVSS, CWE, distro package mappings, trigger conditions, and confirmed security impact. Analysis should remain conservative until vendor advisories add detail.

Mitigation direction

  • Check Linux vendor or distribution advisories for CVE-2023-53568 coverage.
  • Update affected kernels to versions containing the referenced stable fixes.
  • Prioritize systems using s390/zcrypt functionality or matching listed affected versions.
  • If patching is delayed, monitor for abnormal kernel memory/resource pressure.
  • Document accepted risk where affected s390/zcrypt exposure is not present.

Validation and detection

  • Inventory Linux kernel versions across relevant systems.
  • Map running kernels to vendor advisories or referenced stable commits.
  • Confirm whether s390/zcrypt functionality is present or in use.
  • Verify patched systems include the resource-freeing fix for dev_set_name() failure.
  • Record evidence because the CVE bundle lacks CVSS and CPE detail.
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-2023-53568 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
7Source 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
LinuxLinux00fab2350e6b91e57b3cdcd5d9f01056775a921d, 00fab2350e6b91e57b3cdcd5d9f01056775a921d, 00fab2350e6b91e57b3cdcd5d9f01056775a921d, 00fab2350e6b91e57b3cdcd5d9f01056775a921d, 00fab2350e6b91e57b3cdcd5d9f01056775a921d, 00fab2350e6b91e57b3cdcd5d9f01056775a921dunaffected
LinuxLinux4.20, 0, 5.4.257, 5.10.195, 5.15.132, 6.1.54, 6.5.4, 6.6affected
Weakness

CWE details

No CWE listed

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