{"id":"CVE-2026-84895","title":"In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method","summary":"In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release t…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-416"],"vendor":"Facebook","product":"proxygen","affected":["proxygen >= v2026.04.06.00 < v2026.09.28.00"],"published":"2026-09-28","updated":"2026-10-01","sourceUpdated":"2026-10-01T15:17:32.457","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84895","references":[{"url":"https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083","label":"cve-assign@fb.com"},{"url":"https://www.facebook.com/security/advisories/cve-2026-84895","label":"cve-assign@fb.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84895.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-84895"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84895"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00195,"epssPercentile":0.09097,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-01T14:01:47.375791Z"},"scores":{"nvd":7.3,"vendor":7.5,"adp":7.3},"ingestedAt":"2026-09-28T21:20:54.786Z","slug":"CVE-2026-84895","body":"## Overview\n\nIn proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the last reference to the session and destroy it.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84895.json)","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214344,"id":"CVE-2026-84895","ts":1790869743585,"field":"cvss","old":"7.5","new":"7.3"},{"seq":212305,"id":"CVE-2026-84895","ts":1790668142720,"field":"cvss","old":null,"new":"7.5"},{"seq":212304,"id":"CVE-2026-84895","ts":1790668142720,"field":"severity","old":"none","new":"high"}]}