{"id":"CVE-2026-34183","summary":"Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler","details":"Issue summary: Remote peer may exhaust heap memory of the QUIC\nserver or client by flooding it with packets containing PATH_CHALLENGE\nframes.\n\nImpact summary: A malicious remote peer can cause an unbounded\nmemory allocation which can lead to an abnormal termination of the\napplication acting as a QUIC client or server and a Denial of Service.\n\nA remote peer may exhaust heap memory by flooding the local\nQUIC stack with PATH_CHALLENGE frames. The local QUIC stack\nallocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.\nThe allocated PATH_RESPONSE frame gets freed only when the remote\npeer acknowledges reception of the PATH_RESPONSE frame which will\nnot be done by a malicious peer.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by\nthis issue. The QUIC stack is outside of OpenSSL FIPS module\nboundary.","modified":"2026-06-11T19:59:09.728438914Z","published":"2026-06-09T16:03:23.623Z","related":["ALSA-2026:25237","CGA-vgvw-4grv-5fjc"],"database_specific":{"cna_assigner":"openssl","cwe_ids":["CWE-1325"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34183.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34183.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34183"},{"type":"ADVISORY","url":"https://openssl-library.org/news/secadv/20260609.txt"},{"type":"FIX","url":"https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517"},{"type":"FIX","url":"https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac"},{"type":"FIX","url":"https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac"},{"type":"FIX","url":"https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb"},{"type":"FIX","url":"https://github.com/openssl/security/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517"},{"type":"FIX","url":"https://github.com/openssl/security/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac"},{"type":"FIX","url":"https://github.com/openssl/security/commit/d2e9efbe4900a373227deb136e8665401404ffac"},{"type":"FIX","url":"https://github.com/openssl/security/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openssl/openssl","events":[{"introduced":"11b7b6ea3b65a584e1d31408ed1bdb139465cffd"},{"fixed":"1e963a8680ec78ad2072792c7a1a71f3c530bd2e"},{"introduced":"7b371d80d959ec9ab4139d09d78e83c090de9779"},{"fixed":"aae016bfd52fcad2bc9657c2c782cfdf73b1ed5f"},{"introduced":"636dfadc70ce26f2473870570bfd9ec352806b1d"},{"fixed":"8cf17aaeb4599f8af87fefd810b5b5fee90fe69e"},{"introduced":"98acb6b02839c609ef5b837794e08d906d965335"},{"fixed":"c5ea1cc227fd60afae8ac4b9438690bbe4888f79"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.0.0"},{"fixed":"4.0.1"},{"introduced":"3.6.0"},{"fixed":"3.6.3"},{"introduced":"3.5.0"},{"fixed":"3.5.7"},{"introduced":"3.4.0"},{"fixed":"3.4.6"}]}}],"versions":["openssl-4.0.0","openssl-3.4.5","openssl-3.5.6","openssl-3.6.2","openssl-3.4.4","openssl-3.5.5","openssl-3.6.1","3.4-POST-CLANG-FORMAT-WEBKIT","3.4-PRE-CLANG-FORMAT-WEBKIT","3.5-POST-CLANG-FORMAT-WEBKIT","3.5-PRE-CLANG-FORMAT-WEBKIT","3.6-POST-CLANG-FORMAT-WEBKIT","3.6-PRE-CLANG-FORMAT-WEBKIT","openssl-3.6.0","openssl-3.4.3","openssl-3.5.4","openssl-3.5.3","openssl-3.5.2","openssl-3.4.2","openssl-3.5.1","openssl-3.5.0","openssl-3.4.1","openssl-3.4.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-34183.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}