UBUNTU-CVE-2025-49847
- Source
- https://ubuntu.com/security/CVE-2025-49847
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-49847.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-49847
- Upstream
- Published
- 2025-06-17T20:15:00Z
- Modified
- 2026-05-20T16:23:33Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
llama.cpp is an inference of several LLM models in C/C++. Prior to version b5662, an attacker‐supplied GGUF model vocabulary can trigger a buffer overflow in llama.cpp’s vocabulary‐loading code. Specifically, the helper _try_copy in llama.cpp/src/vocab.cpp: llama_vocab::impl::token_to_piece() casts a very large size_t token length into an int32_t, causing the length check (if (length < (int32_t)size)) to be bypassed. As a result, memcpy is still called with that oversized size, letting a malicious model overwrite memory beyond the intended buffer. This can lead to arbitrary memory corruption and potential code execution. This issue has been patched in version b5662.
- References
-
- https://ubuntu.com/security/CVE-2025-49847
- https://www.cve.org/CVERecord?id=CVE-2025-49847
- https://github.com/ggml-org/llama.cpp/security/advisories/GHSA-8wwf-w4qm-gpqr
- https://github.com/ggml-org/llama.cpp/commit/3cfbbdb44e08fd19429fed6cc85b982a91f0efd5
- https://github.com/ggml-org/llama.cpp/commit/3cfbbdb44e08fd19429fed6cc85b982a91f0efd5
Affected packages
Ubuntu:25.10 / llama.cpp
Package
- Name
- llama.cpp
- Purl
- pkg:deb/ubuntu/llama.cpp?arch=source&distro=questing
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
Other
5318+dfsg-1
5318+dfsg-2
5713+dfsg-1
5760+dfsg-1
5760+dfsg-3
5760+dfsg-4
5882+dfsg-2
Ubuntu:26.04:LTS / llama.cpp
Package
- Name
- llama.cpp
- Purl
- pkg:deb/ubuntu/llama.cpp?arch=source&distro=resolute
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Ecosystem specific
{
"binaries": [
{
"binary_name": "libllama0",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-examples",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-tests",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-tools",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-tools-extra",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "python3-gguf",
"binary_version": "8681+dfsg-1"
}
]
}