{"answers":{"affected":"1 open source package ship an affected version, including libavc.","exploited":"There is no known exploitation of OSV-2023-840 in the wild and no public exploit code.","fix":"No fix has been published for OSV-2023-840 yet. Limit exposure of the affected software until one is available.","what":"OSV-2023-840 is a vulnerability in libavc, published on 13 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for OSV-2023-840 and fix it if it is affected.\n\nWhat it is: OSV-2023-840 is a vulnerability in libavc, published on 13 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of OSV-2023-840 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- libavc (OSS-Fuzz): affected all versions; no fix listed\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/OSV-2023-840/ (Markdown: https://insights.sbomify.com/OSV-2023-840/index.md)","id":"OSV-2023-840","markdown":"https://insights.sbomify.com/OSV-2023-840/index.md","name":"OSV-2023-840","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Video codec library","requires_auth":"none","summary":"A null pointer dereference in the video codec library allows attackers to cause a denial of service via crafted media files.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=62290\n\n```\nCrash type: Null-dereference READ\nCrash state:\nisvcd_parse_inter_slice_data_cavlc_enh_lyr\nisvcd_parse_epslice\nisvcd_parse_decode_slice_ext_nal\n```","ecosystems":["OSS-Fuzz"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Null-dereference READ in isvcd_parse_inter_slice_data_cavlc_enh_lyr","id":"OSV-2023-840","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"OSS-Fuzz","product":null,"products":[],"type":"null_dereference","year":"2023"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"OSS-Fuzz","fixed":[],"introduced":[],"last_affected":[],"package":"libavc","purl":"pkg:generic/libavc","source":"OSV-2023-840"}],"products":null,"published":"2023-09-13","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"OSS-Fuzz","prefix":"OSV"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"A null pointer dereference in the video codec library allows attackers to cause a denial of service via crafted media files.","url":"https://insights.sbomify.com/OSV-2023-840/"}