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  4. CVE 2026 116840 llamacpp b5854 before b11275 integer overflow in
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Back to active CVEs
Medium · CVSS 6.9CVE-2026-116840

llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_readerCVE-2026-116840

Answer in brief

CVE-2026-116840 records a Medium severity (CVSS 6.9) vulnerability in llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader. The current sources do not mark it as known exploited. The current feed maps ggml-org/llama.cpp (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ggml-org/llama.cpp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ggml-org/llama.cppgeneric>=b5854 <b11275 || >=0.1.0 <0.6.0b11275, 0.6.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ggml-org/llama.cpp.
  2. 2Review the reported fix. Update ggml-org/llama.cpp to b11275 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 27, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

llama.cpp b5854 before b11275 contains an integer overflow vulnerability in gguf_init_from_reader that bypasses the CVE-2025-53630 size check when padding near-SIZE_MAX tensor sizes. Attackers can supply a crafted GGUF file whose tensor size pads to zero, causing an undersized data blob and out-of-bounds reads by consumers.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • llama.cpp before b2731 Out-of-Bounds Read via GGUF Tensor OffsetsSame ggml-org/llama.cpp package
  • llama.cpp before b3701 Out-of-Bounds Read in llama_decode via Token IDsSame ggml-org/llama.cpp package
  • llama.cpp before b5649 Heap Out-of-Bounds Read via llama_vocab::impl::print_infoSame ggml-org/llama.cpp package
  • llama.cpp b5899 before b10261 Heap Out-of-Bounds Write via plamo2 TokenizerSame ggml-org/llama.cpp package
  • llama.cpp b10398 before b11301 Integer Overflow in gguf_init_from_readerSame ggml-org/llama.cpp package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-190
Source
CVE List V5
Source checked
Oct 27, 2026
References
6 linked sources
Open source record