Vulnerability · Published Aug 6, 2026 · Assigned by VulnCheck
CVE-2026-43630llama.cpp b4882-b8487 Out-of-Bounds Read Information Disclosure
Medium 6.5
In plain English
A medium-severity out-of-bounds read in llama.cpp from ggml-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
llama.cpp builds b4882 before b8487 contain an out-of-bounds read vulnerability in the recurrent memory state restore path that allows attackers with write access to the slot save directory to read memory past the end of the allocated cells array. Attackers can craft a malicious slot file with an oversized seq_id value to trigger an out-of-bounds read that leaks heap data including pointer values into server logs, defeating ASLR protections and facilitating further exploitation.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | llama.cpp | 8611+dfsg-1 | DEBIAN-CVE-2026-43630 |
| Ubuntu:26.04:LTS | llama.cpp | no fix listed | UBUNTU-CVE-2026-43630 |
| Ubuntu:26.10 | llama.cpp | no fix listed | UBUNTU-CVE-2026-43630 |
Affected products (as reported)
Weakness: CWE-125, CWE-209 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
References
- https://github.com/ggml-org/llama.cpp product
- https://github.com/ggml-org/llama.cpp/commit/f93c09e2673090b59802f2552848a1cac70598b0 patch
- https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches related
- https://www.vulncheck.com/advisories/llama-cpp-b5702-b7653-out-of-bounds-read-information-disclosure