{"id":"CVE-2026-15442","title":"In all builds that make use of (D)TLS, including default builds, there is a series of conditional states during the TLS shutdown which could lead to a heap-use-after free","summary":"In all builds that make use of (D)TLS, including default builds, there is a series of conditional states during the TLS shutdown which could lead to a heap-use-after free. If an application ended up getting a partial wolfSSL_read() which…","severity":"low","cvss":2.3,"cvssVector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","cwe":["CWE-416"],"vendor":"wolfSSL","product":"wolfSSL","affected":["wolfSSL >= 4.4.0 <= 5.9.2"],"published":"2026-09-27","updated":"2026-09-27","sourceUpdated":"2026-09-27T10:16:56.893","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-15442","references":[{"url":"https://github.com/wolfSSL/wolfssl/pull/10863","label":"facts@wolfssl.com"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-27T09:45:46.029Z","slug":"CVE-2026-15442","body":"## Overview\n\nIn all builds that make use of (D)TLS, including default builds, there is a series of conditional states during the TLS shutdown which could lead to a heap-use-after free. If an application ended up getting a partial wolfSSL_read() which is sometimes caused by a small user buffer  passed in, then called wolfSSL_shutdown for a bidirectional close and attempted to wolfSSL_read() again while the peer continues trying to send data during the shutdown it would lead to a state where a potential heap-use-after free happened.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":13,"depthScoreParts":{"impact":12.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}