{"id":"EM-20261105-SBN6","url":"https://cyber.eventmonitor.net/incident/EM-20261105-SBN6/gdb-vulnerability-cve-2026-121996/","type":"cve","title":"gdb Vulnerability (CVE-2026-121996)","subtitle":"CVE-2026-121996","subject":"CVE-2026-121996","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-05T17:18:00.870Z","firstSignal":"2026-11-05T14:29:20.000Z","lastSignal":"2026-11-05T17:18:00.870Z","updated":"2026-11-06T00:58:29.349Z","revision":1,"life":[{"status":"Born","at":"2026-11-05T17:18:00.870Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-05T17:18:00.870Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-05T14:29:20.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-05T17:18:00.870Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261105-SBN6 created."}],"stages":[{"name":"Disclosed","at":"2026-11-05T17:18:00.870Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-05T17:18:00.870Z","detail":"CVSS 8.2"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-05T14:29:20.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-05T14:29:20.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-121996 (important)","text":"gdb: gdbserver: heap disclosure and wild pointer in gdb_parse_agent_expr via untrusted agent-expression length","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-121996.json"},{"at":"2026-11-05T17:18:00.870Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-121996 (CVSS 8.2)","text":"A length validation flaw in gdbserver's agent-expression parser allows an unauthenticated remote attacker to read uninitialized heap memory from the gdbserver process and cause a denial of service. Disclosed heap content includes addresses suitable for defeating ASLR in further exploitation.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121996"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-05T17:18:00.870","score":8.2,"severity":"HIGH","desc":"A length validation flaw in gdbserver's agent-expression parser allows an unauthenticated remote attacker to read uninitialized heap memory from the gdbserver process and cause a denial of service. Disclosed heap content includes addresses suitable for defeating ASLR in further exploitation.","product":"","seen":1793917591435},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}