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CVE Record

CVE-2018-20541: There is a heap-based buffer overflow in libxsmm_sparse_csc_reader at generator_spgemm_csc_reader.c in LIBX...

There is a heap-based buffer overflow in libxsmm_sparse_csc_reader at generator_spgemm_csc_reader.c in LIBXSMM 1.10, a different vulnerability than CVE-2018-20542 (which is in a different part of the source code and is seen at different addresses).

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-20541 is a heap-based buffer overflow in LIBXSMM 1.10. In plain terms, malformed data reaching a specific sparse-matrix reader could make the program handle memory unsafely. The public bundle does not provide a CVSS score, affected downstream products, or confirmed exploitation.

Executive priority

Treat this as an inventory and patch-management item unless the affected parser handles untrusted data in business-critical workflows. Escalate priority if LIBXSMM 1.10 is reachable through customer-supplied files or automated data pipelines.

Technical view

The flaw is reported in libxsmm_sparse_csc_reader in generator_spgemm_csc_reader.c in LIBXSMM 1.10. It is distinct from CVE-2018-20542, which affects different source code locations. Available sources identify an upstream issue, Red Hat Bugzilla entry, and upstream commit, but provide limited severity and remediation detail.

Likely exposure

Exposure is most likely where LIBXSMM 1.10 is embedded directly or through packaged software and processes CSC sparse matrix input. Business exposure depends on whether untrusted or externally supplied matrix files can reach this reader.

Exploitation context

The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. Risk should be treated as input-dependent memory corruption, not assumed internet-exploitable without local reachability analysis.

Researcher notes

Public metadata is sparse: no CVSS, CWE, downstream affected product list, or exploit confirmation is included. Focus validation on version presence, parser reachability, trusted-boundary assumptions, and whether the referenced upstream commit is included in local or vendor builds.

Mitigation direction

  • Inventory direct and transitive use of LIBXSMM 1.10.
  • Review upstream LIBXSMM issue and commit for vendor-confirmed remediation guidance.
  • Prefer vendor or distribution packages containing the upstream correction.
  • Restrict untrusted CSC sparse-matrix input until patched or validated.
  • Track Red Hat or distribution advisories if using packaged LIBXSMM.

Validation and detection

  • Confirm whether LIBXSMM 1.10 is present in builds or runtime packages.
  • Check whether libxsmm_sparse_csc_reader is reachable in production workflows.
  • Identify whether users can supply CSC sparse-matrix input.
  • Compare deployed source or package state against the referenced upstream commit.
  • Document compensating controls for any unpatched reachable deployments.
Prepared
Confidence
medium
Sources
5

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-2018-20541 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
4Source 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.