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CVE Record

CVE-2024-42320: s390/dasd: fix error checks in dasd_copy_pair_store()

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix error checks in dasd_copy_pair_store() dasd_add_busid() can return an error via ERR_PTR() if an allocation fails. However, two callsites in dasd_copy_pair_store() do not check the result, potentially resulting in a NULL pointer dereference. Fix this by checking the result with IS_ERR() and returning the error up the stack.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel bug in the IBM s390 DASD storage driver. An allocation failure may be handled incorrectly, causing a kernel NULL pointer dereference. Business impact is most likely service disruption on affected Linux systems using this specialized mainframe storage path, not broad internet compromise.

Executive priority

Treat this as targeted operational risk for mainframe Linux environments. It is not supported as actively exploited, but affected storage hosts should be patched through normal kernel maintenance because a kernel crash can interrupt critical workloads.

Technical view

dasd_add_busid() may return ERR_PTR() on allocation failure. dasd_copy_pair_store() had two callsites that did not check that result, creating a potential NULL pointer dereference. The upstream resolution adds IS_ERR() checks and returns the error up the stack.

Likely exposure

Exposure appears limited to Linux on s390 systems using the DASD driver and the affected copy-pair code path. The provided record lists affected Linux kernel entries including 6.1, 6.1.103, 6.6.44, 6.10.3, and 6.11, but product-specific packaging status requires vendor confirmation.

Exploitation context

The source bundle does not cite active exploitation, and KEV is false. The described failure depends on an allocation-error path in a kernel storage driver. No public exploitability details, required privileges, or remote attack path are established in the provided evidence.

Researcher notes

The record lacks CVSS, CWE, privilege, and trigger details. Analysis should stay close to the upstream fix: unchecked ERR_PTR handling in dasd_copy_pair_store(). Validate exposure through kernel source/package lineage and s390 DASD usage, not generic Linux presence alone.

Mitigation direction

  • Apply a vendor-supported kernel containing the referenced stable fixes.
  • For Debian LTS systems, review the cited January 2025 advisory.
  • Prioritize s390 hosts using DASD storage features.
  • Check Linux distribution advisories for exact fixed package versions.
  • Avoid direct wrangler-style assumptions; follow kernel or distribution guidance only.

Validation and detection

  • Inventory Linux s390 or s390x systems using DASD storage.
  • Compare running kernel packages against vendor fixed versions.
  • Confirm the relevant stable commit is included in deployed kernels.
  • Review logs for unexplained kernel oops or storage-driver crashes.
  • Document affected, fixed, and exception systems separately.
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

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CVE-2024-42320 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
2ADP providers
6Source 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
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa91ff09d39f9b6545254839ac91f1ff7bd21d39e, a91ff09d39f9b6545254839ac91f1ff7bd21d39e, a91ff09d39f9b6545254839ac91f1ff7bd21d39e, a91ff09d39f9b6545254839ac91f1ff7bd21d39e, 932600a295cc299d470ca7f5d6491bd0dfc99ea7, 5.15.153unaffected
LinuxLinux6.1, 0, 6.1.103, 6.6.44, 6.10.3, 6.11affected
Weakness

CWE details

No CWE listed

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