{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43631 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-43631 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-43631 is a critical use after free vulnerability in ggml-org llama.cpp, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-43631 and fix it if it is affected.\n\nWhat it is: CVE-2026-43631 is a critical use after free vulnerability in ggml-org llama.cpp, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-43631 in the wild and no public exploit code.\n\nAffected product: ggml-org llama.cpp. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-43631/ (Markdown: https://insights.sbomify.com/CVE-2026-43631/index.md)","id":"CVE-2026-43631","markdown":"https://insights.sbomify.com/CVE-2026-43631/index.md","name":"CVE-2026-43631","record":{"aliases":["DEBIAN-CVE-2026-43631","GHSA-6hc7-9rph-cm99","UBUNTU-CVE-2026-43631"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"LLM inference server","requires_auth":"none","summary":"Unauthenticated attackers can achieve remote code execution in llama-server via a use-after-free vulnerability when the sleep-idle-seconds feature is enabled.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"llama.cpp","vendor":"ggml"}],"cvss":{"score":9.2,"severity":"critical","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"llama.cpp builds b7492 through the latest b9060 contains a use-after-free vulnerability in the vocab pointer of llama-server when the --sleep-idle-seconds feature is enabled, allowing unauthenticated remote attackers to execute arbitrary code. Attackers can trigger the vulnerability by sending requests to affected endpoints while the server transitions to sleep mode, causing concurrent worker threads to dereference a freed vocab pointer that can be reclaimed with attacker-controlled data to achieve remote code execution.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"llama.cpp b7492–b9060 Use-After-Free RCE via llama-server","id":"CVE-2026-43631","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"llama.cpp b7492–b9060 Use-After-Free in Tokenization Endpoints","id":"CVE-2026-43632"},"packages":[],"prev":{"headline":"llama.cpp b4882-b8487 Out-of-Bounds Read Information Disclosure","id":"CVE-2026-43630"},"products":["llama.cpp"],"published":"2026-08-06","related":[{"cvss_score":10,"headline":"llama.cpp allows write-what-where in rpc_server::set_tensor","id":"CVE-2024-42479","kev_date_added":null,"published":"2024-08-12"},{"cvss_score":9.8,"headline":"llama.cpp: Unauthenticated RCE via GRAPH_COMPUTE buffer=0 bypass in llama.cpp RPC backend","id":"CVE-2026-34159","kev_date_added":null,"published":"2026-04-01"},{"cvss_score":9.2,"headline":"llama.cpp b4882–b9058 Buffer Overflow in KV Cache State Restore","id":"CVE-2026-43629","kev_date_added":null,"published":"2026-08-06"},{"cvss_score":9.2,"headline":"llama.cpp b7492–b9060 Use-After-Free in Tokenization Endpoints","id":"CVE-2026-43632","kev_date_added":null,"published":"2026-08-06"},{"cvss_score":8.8,"headline":"llama.cpp has Out-of-bounds Write in llama-server","id":"CVE-2026-21869","kev_date_added":null,"published":"2026-01-07"},{"cvss_score":8.8,"headline":"llama.cpp Vulnerable to Buffer Overflow via Malicious GGUF Model","id":"CVE-2025-49847","kev_date_added":null,"published":"2025-06-17"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-14","vendors":["ggml-org"]},"summary":"Unauthenticated attackers can achieve remote code execution in llama-server via a use-after-free vulnerability when the sleep-idle-seconds feature is enabled.","url":"https://insights.sbomify.com/CVE-2026-43631/"}