CVE-2026-43628
Integer underflow in llama.cpp DRY sampler enables remote DoS and token-sampling corruption.
Is CVE-2026-43628 being exploited?
Not confirmed. CVE-2026-43628 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.20% probability of exploitation in the next 30 days.
How severe is CVE-2026-43628?
CVE-2026-43628 is rated High. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-43628?
Not known from our data. No patch reference has been recorded for CVE-2026-43628, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-43628 affect?
CVE-2026-43628 affects llama.cpp builds b3978–b9058, Servers exposing /v1/completions, Servers exposing /v1/chat/completions, Self-hosted LLM inference endpoints. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43628?
Apply vendor patch when released; restrict/require auth on inference endpoints and validate dry_allowed_length.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated HTTP request with dry_allowed_length=INT32_MIN triggers heap underflow/out-of-bounds read causing SIGSEGV DoS or corrupted sampling probabilities.
Immediate action required
- affected>= b3978 and <= b9058
- affected>= 0.11.0 and <= 0.17.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.