UBUNTU-CVE-2026-43632
- Source
- https://ubuntu.com/security/CVE-2026-43632
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43632.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-43632
- Upstream
- Published
- 2026-08-07T00:00:00Z
- Modified
- 2026-08-07T17:45:14.655320904Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
llama.cpp builds b7492 through the latest b9060 contains a use-after-free vulnerability in llama-server affecting six tokenization endpoints (/tokenize, /detokenize, /infill, /apply-template, /rerank, and /anthropic/counttokens) that bypass the task queue and access ctxserver.vocab directly on HTTP worker threads. Attackers can exploit a time-of-check-time-of-use race condition where the main thread destroys and frees vocab after the synchronization lock is released but before the handler finishes using it, causing a crash or potential code execution when --sleep-idle-seconds is configured.
- References
Affected packages
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
-
Introduced0Unknown introduced version / All previous versions are affected
Ecosystem specific
{
"binaries": [
{
"binary_version": "8681+dfsg-1",
"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"
}
]
}