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CVE Record

CVE-2018-20542: There is a heap-based buffer-overflow at generator_spgemm_csc_reader.c (function libxsmm_sparse_csc_reader)...

There is a heap-based buffer-overflow at generator_spgemm_csc_reader.c (function libxsmm_sparse_csc_reader) in LIBXSMM 1.10, a different vulnerability than CVE-2018-20541 (which is in a different part of the source code and is seen at a different address).

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-20542 is a reported heap-based buffer overflow in LIBXSMM 1.10. The available CVE text identifies the vulnerable source file and function, but does not provide CVSS, confirmed impact, affected downstream products, or exploitation evidence. Organizations should focus on whether LIBXSMM 1.10 is present in workloads that process externally supplied sparse matrix data.

Executive priority

Prioritize discovery over emergency response. There is no sourced evidence of active exploitation or broad product exposure, but memory corruption in a data parser can matter in research, HPC, or ML environments that process untrusted inputs.

Technical view

The issue is described in generator_spgemm_csc_reader.c, function libxsmm_sparse_csc_reader, in LIBXSMM 1.10. It is distinct from CVE-2018-20541. Public references include Red Hat bugs, a LIBXSMM GitHub issue, and an upstream commit, but the supplied bundle does not establish impact, exploitability, or full affected-version range.

Likely exposure

Exposure is likely limited to systems, applications, or scientific/HPC workloads that embed or package LIBXSMM 1.10 and use the affected sparse CSC reader path. The source bundle does not identify downstream products, operating systems, or package versions.

Exploitation context

No active exploitation is supported by the supplied sources, and the CVE is not listed as KEV. The vulnerability class is memory corruption, but the bundle does not confirm whether practical exploitation leads to denial of service, code execution, or another impact.

Researcher notes

The supplied record lacks CVSS, CWE, affected CPEs, and impact analysis. Treat conclusions beyond LIBXSMM 1.10 and the named function as unconfirmed unless corroborated by the GitHub issue, commit review, or vendor advisories.

Mitigation direction

  • Inventory applications and packages that include LIBXSMM 1.10.
  • Review the LIBXSMM issue and referenced upstream commit for vendor-confirmed remediation.
  • Apply a vendor-supported LIBXSMM update when available for your platform.
  • Limit processing of externally supplied CSC sparse matrix inputs where feasible.
  • Track Red Hat and upstream LIBXSMM guidance for package-specific fixes.

Validation and detection

  • Confirm whether deployed builds contain LIBXSMM 1.10.
  • Check whether generator_spgemm_csc_reader.c includes the referenced upstream changes.
  • Verify package manager or SBOM data for bundled LIBXSMM copies.
  • Review crash reports involving libxsmm_sparse_csc_reader or sparse CSC parsing.
  • Document any internet-facing or user-submitted data path reaching LIBXSMM.
Prepared
Confidence
medium
Sources
6

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-2018-20542 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
5Source 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.