CVE-2026-43628

llama.cpp b3978–b9058 Integer Underflow via DRY Sampler

En bref

Sévérité: HIGH 8.5
EPSS: EPSS 0.23 % · centile 14 (2026-10-28)
État: PUBLISHED
Publiée: 2026-08-06
Mise à jour: 2026-08-14
Attribuée par: VulnCheck
Statut NVD: Analyzed

Description

llama.cpp builds b3978 through b9058 contain an integer underflow and out-of-bounds read vulnerability in the DRY sampler that allows unauthenticated attackers to trigger a heap buffer underflow by sending a crafted HTTP request with dry_allowed_length set to INT32_MIN to the /v1/completions or /v1/chat/completions endpoints. Attackers can exploit this vulnerability to crash the server with SIGSEGV causing denial of service for all connected users, or corrupt token sampling probabilities by reading garbage values from memory before the allocated buffer.

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	HIGH 8.5	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	VulnCheck
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	VulnCheck
CVSS 4.0	HIGH 8.5	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	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	NVD · disclosure@vulncheck.com (Secondary)

Faiblesses (CWE)

Références européennes

ENISA EUVD · EUVD-2026-54283
GCVE · GCVE-0-2026-43628

Configurations affectées (CPE NVD)

cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:* ≥ b3978 ≤ b9058

Produits affectés

Produit	Versions
ggml-org · llama.cpp	affected b3978 ≤ b9058 ; affected 0.11.0 ≤ 0.17.1

Références

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD