{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-39461 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-39461 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-39461 is a high-severity memory corruption vulnerability in Freebsd Freebsd, published on 21 May 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-39461 and fix it if it is affected.\n\nWhat it is: CVE-2026-39461 is a high-severity memory corruption vulnerability in Freebsd Freebsd, published on 21 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-39461 in the wild and no public exploit code.\n\nAffected product: Freebsd Freebsd. 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-2026-39461/ (Markdown: https://insights.sbomify.com/CVE-2026-39461/index.md)","id":"CVE-2026-39461","markdown":"https://insights.sbomify.com/CVE-2026-39461/index.md","name":"CVE-2026-39461","record":{"aliases":["GHSA-pwph-948j-pgvj"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["privilege_escalation","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"FreeBSD OS","requires_auth":"low_privilege","summary":"A stack overflow in libcasper(3) allows local attackers to escalate privileges to root by triggering file descriptor set overflow.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"freebsd","cpe":[{"product":"freebsd","vendor":"freebsd"}],"cvss":{"score":8.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"libcasper(3) communicates with helper processes via UNIX domain sockets, and uses the select(2) system call to wait for data to become available.  However, it does not verify that its socket descriptor fits within select(2)'s descriptor set size limit of FD_SETSIZE (1024).\n\nAn attacker able to cause an application using libcasper(3) to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, may trigger stack corruption.  If the target application runs with setuid root privileges, this could be used to escalate local privileges.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"select(2) file descriptor set overflow causes stack overflow","id":"CVE-2026-39461","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"freebsd:freebsd","products":["freebsd:freebsd"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"SenseLive X3050 Insufficiently Protected Credentials","id":"CVE-2026-39462"},"packages":[],"prev":{"headline":"Red Lion Controls N-Tron 700 Series Insufficiently Protected Credentials","id":"CVE-2026-39460"},"products":["FreeBSD"],"published":"2026-05-21","related":[{"cvss_score":10,"headline":"Memory corruption in FreeBSD","id":"CVE-2018-17160","kev_date_added":null,"published":"2018-12-04"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2014-3954","kev_date_added":null,"published":"2014-10-27"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2006-4304","kev_date_added":null,"published":"2006-08-24"},{"cvss_score":10,"headline":"Integer overflow in n/a","id":"CVE-2006-0226","kev_date_added":null,"published":"2006-01-19"},{"cvss_score":10,"headline":"Denial of service in n/a","id":"CVE-2004-0002","kev_date_added":null,"published":"2004-02-03"},{"cvss_score":10,"headline":"Security feature bypass in n/a","id":"CVE-2001-0969","kev_date_added":null,"published":"2002-03-09"},{"cvss_score":10,"headline":"Denial of service in n/a","id":"CVE-2001-0388","kev_date_added":null,"published":"2001-09-18"}],"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":"2026-05-22","vendors":["FreeBSD"]},"summary":"A stack overflow in libcasper(3) allows local attackers to escalate privileges to root by triggering file descriptor set overflow.","url":"https://insights.sbomify.com/CVE-2026-39461/"}