CVE catalog

CVE-2026-70638

llama.cpp builds b1886 through b7445 contain an…

[CVE catalog]

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
High · CVSS 8.5CVSS: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
Published
Source
[NVD] · [CVE record]
EPSS
0.23% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "llama.cpp",
      "ranges": [
        {
          "fixed": "",
          "introduced": "b1886",
          "last_affected": "b7445",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-70638"
    },
    {
      "name": "llama.cpp",
      "distro": "debian",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7593+dfsg-1"
            }
          ]
        }
      ],
      "release": "14",
      "versions": [
        "5151+dfsg-1~exp2",
        "5151+dfsg-1~exp3",
        "5318+dfsg-1",
        "5318+dfsg-2",
        "5713+dfsg-1",
        "5760+dfsg-1",
        "5760+dfsg-2",
        "5760+dfsg-3",
        "5760+dfsg-4",
        "5882+dfsg-1",
        "5882+dfsg-2",
        "5882+dfsg-3",
        "5882+dfsg-3~exp1",
        "5882+dfsg-3~exp2",
        "5882+dfsg-3~exp3",
        "5882+dfsg-4",
        "6641+dfsg-1",
        "6641+dfsg-2",
        "6641+dfsg-3"
      ],
      "ecosystem": "deb",
      "fixed_version": "7593+dfsg-1",
      "provider_record_id": "DEBIAN-CVE-2026-70638"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]