CVE-2026-43628: Integer underflow in llama.cpp DRY sampler causes denial of service
llama.cpp
Llama.cpp contains an integer underflow vulnerability in the DRY sampler affecting completion endpoints. Attackers can send crafted HTTP requests to crash the server or corrupt token sampling probabilities.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 8.5
- EPSS
- <0.01 · top 86% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 6 Aug 2026
- last update
- 6 Aug 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-08-06CVE-2026-43628: llama.cpp builds b3978 through b9058 contain an integer underflow and out-of-bounds read vulnerability in the DRY sampler that…NVD · nvd.nist.gov/vuln/detail/CVE-2026-43628
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 6 Aug 2026 · first reported 6 Aug 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
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the brief as text
# CVE-2026-43628: Integer underflow in llama.cpp DRY sampler causes denial of service https://gcdradar.vercel.app/incidents/cve-2026-43628-integer-underflow-in-llama-cpp-dry-sampler-ca · AIR-2026-0066 · closed 2026-08-06 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-08-06 - AI role: Attack on AI - Products: llama.cpp - CVE ids: CVE-2026-43628 - CVSS: 8.5 ## Summary Llama.cpp contains an integer underflow vulnerability in the DRY sampler affecting completion endpoints. Attackers can send crafted HTTP requests to crash the server or corrupt token sampling probabilities. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-08-06: CVE-2026-43628: llama.cpp builds b3978 through b9058 contain an integer underflow and out-of-bounds read vulnerability in the DRY sampler that… (https://nvd.nist.gov/vuln/detail/CVE-2026-43628) ## Sources - 2026-08-06 NVD: CVE-2026-43628: llama.cpp builds b3978 through b9058 contain an integer underflow and out-of-bounds read vulnerability in the DRY sampler that… https://nvd.nist.gov/vuln/detail/CVE-2026-43628 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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