CVE-2026-73282

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{"bugzilla": {"description": "openssh: OpenSSH: Information disclosure and data corruption via use-after-free in ssh client", "id": "2514328", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514328"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in OpenSSH. A use-after-free vulnerability exists in the `ssh` client when handling concurrent remote-forwarding operations. This can occur if a remote forwarding is added via the local session multiplexing socket while a remote forwarding open request is pending with the server. A remote attacker with high attack complexity could potentially exploit this to achieve low impact on confidentiality and integrity."], "mitigation": {"lang": "en:us", "value": "Avoid issuing dynamic remote-forwarding commands over active SSH multiplexing connections, or disable socket multiplexing by setting ControlMaster no in ~/.ssh/config."}, "name": "CVE-2026-73282", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-11T19:12:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-73282\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-73282\nhttps://www.openssh.org/releasenotes.html#10.5"], "statement": "A use-after-free flaw exists in OpenSSH's ssh client during concurrent remote-forwarding processing. When adding a remote forward via the local session multiplexing socket while a server remote-forward open request is pending, realloc data management fails, freeing memory that remains actively referenced. A remote attacker with high attack complexity can exploit this timing window to corrupt process memory, posing a low impact to confidentiality, integrity, and availability.", "threat_severity": "Moderate"}

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