Vulnerability-Lookup

GHSA-P56F-GV6X-V6MG

Vulnerability from github – Published: 2026-08-07 00:31 – Updated: 2026-08-07 00:31

Details

llama.cpp builds b1886 through b7445 contain an integer overflow vulnerability in the LLaMA-Android JNI wrapper where the new_1batch() function multiplies sizeof(llama_seq_id) by an attacker-controlled n_seq_max parameter without overflow validation, causing heap buffer allocation to wrap and allocate insufficient memory. Attackers can exploit this by providing a crafted n_seq_max value through a malicious model file or JNI call to trigger heap corruption and achieve denial of service or arbitrary code execution on Android applications using the LLaMA-Android binding.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

8.5 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-70638"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-06T22:18:28Z",
    "severity": "HIGH"
  },
  "details": "llama.cpp builds b1886 through b7445 contain an integer overflow vulnerability in the LLaMA-Android JNI wrapper where the new_1batch() function multiplies sizeof(llama_seq_id) by an attacker-controlled n_seq_max parameter without overflow validation, causing heap buffer allocation to wrap and allocate insufficient memory. Attackers can exploit this by providing a crafted n_seq_max value through a malicious model file or JNI call to trigger heap corruption and achieve denial of service or arbitrary code execution on Android applications using the LLaMA-Android binding.",
  "id": "GHSA-p56f-gv6x-v6mg",
  "modified": "2026-08-07T00:31:22Z",
  "published": "2026-08-07T00:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-70638"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ggml-org/llama.cpp/releases/tag/b7446"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-70638 (GCVE-0-2026-70638)

Vulnerability from cvelistv5 – Published: 2026-08-06 15:35 – Updated: 2026-08-06 15:46 X_Open Source

Title

llama.cpp b1886–b7445 Integer Overflow via new_1batch() in llama-android.cpp

Summary

Severity

8.5 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-190 - Integer Overflow or Wraparound
CWE-122 - Heap-based Buffer Overflow

Assigner

VulnCheck

References

3 references

URL	Tags
https://github.com/ggml-org/llama.cpp/releases/ta…	release-notes
https://github.com/ggml-org/llama.cpp/commit/5c0d…	patch
https://github.com/Vladimir-tokarev-cyera/llama-c…	related

Impacted products

1 product

Vendor	Product	Version
ggml-org	llama.cpp	Affected: b1886 , ≤ b7445 (custom) Affected: 0.9.0 , ≤ 0.17.1 (semver) Unaffected: 5c0d18881e0e9794c96b2602736b758bac9d9388 (git)

Date Public

2026-05-06 00:00

Credits

Vladimir Tokarev (@G1ND1L4) - Vulnerability Research Tech Lead, Cyera Ofek Itach (@ofekitach) - Security Research Team Lead, Cyera

Show details on NVD website

JSON

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  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "llama.cpp",
          "vendor": "ggml-org",
          "versions": [
            {
              "lessThanOrEqual": "b7445",
              "status": "affected",
              "version": "b1886",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "0.17.1",
              "status": "affected",
              "version": "0.9.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5c0d18881e0e9794c96b2602736b758bac9d9388",
              "versionType": "git"
            }
          ]
        }
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      "credits": [
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          "lang": "en",
          "type": "finder",
          "value": "Vladimir Tokarev (@G1ND1L4) - Vulnerability Research Tech Lead, Cyera"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Ofek Itach (@ofekitach) - Security Research Team Lead, Cyera"
        }
      ],
      "datePublic": "2026-05-06T00:00:00.000Z",
      "descriptions": [
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          "lang": "en",
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        }
      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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            "userInteraction": "REQUIRED",
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              "type": "CWE"
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            {
              "cweId": "CWE-122",
              "description": "CWE-122 Heap-based Buffer Overflow",
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      "providerMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-70638",
    "datePublished": "2026-08-06T15:35:08.090Z",
    "dateReserved": "2026-08-04T20:17:18.298Z",
    "dateUpdated": "2026-08-06T15:46:53.865Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-P56F-GV6X-V6MG

CVE-2026-70638 (GCVE-0-2026-70638)

Tags

Sightings

Nomenclature