CVE-2026-123158

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For some configurations of accounts, any password between 256 and 1024 characters succeeds. An example of a platform using musl libc without PAM is Alpine Linux."}, {"lang": "es", "value": "sshd en OpenSSH anterior a la versi\u00f3n 10.6p2 en Linux, cuando se utiliza musl libc sin PAM, carece de una soluci\u00f3n alternativa para una omisi\u00f3n de autenticaci\u00f3n de contrase\u00f1a (relacionado con la mala interpretaci\u00f3n de si una cadena est\u00e1 destinada a ser un hash de contrase\u00f1a). Para algunas configuraciones de cuentas, cualquier contrase\u00f1a entre 256 y 1024 caracteres tiene \u00e9xito. 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{"bugzilla": {"description": "openssh: OpenSSH: Password authentication bypass via password hash misinterpretation", "id": "2567690", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567690"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-303", "details": ["A flaw was found in OpenSSH. When running on Linux systems utilizing the musl standard C library without Pluggable Authentication Modules (PAM), the SSH server can misinterpret input strings as password hashes. A remote, unauthenticated attacker can exploit this flaw by submitting a specially sized password, bypassing password authentication and gaining unauthorized access to affected accounts."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-123158", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:rhel_els:6", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:rhel_els:7", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "openshell", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:5", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 5"}], "public_date": "2026-11-05T15:46:26Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-123158\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-123158\nhttps://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/\nhttps://github.com/google/goonami-scanner/pull/277\nhttps://github.com/leonjza/sshhole-lab\nhttps://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482\nhttps://github.com/predkambrij/sshhole-repro\nhttps://hachyderm.io/@damienmiller/117563026759098135\nhttps://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2\nhttps://news.ycombinator.com/item?id=50377976\nhttps://news.ycombinator.com/item?id=50378228\nhttps://news.ycombinator.com/item?id=50379704\nhttps://sshhole.com\nhttps://www.openssh.org/releasenotes.html#10.6p2"], "statement": "Red Hat products are not affected by this vulnerability. This issue specifically requires OpenSSH to be compiled and executed against the musl C library (musl libc) without PAM enabled. Red Hat Enterprise Linux and all Red Hat product builds link OpenSSH against the GNU C Library (glibc) and use PAM by default.", "threat_severity": "Important"}

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