Libssh: memory exhaustion via repeated key exchange in libssh_CVE-2025-8277

{
    "lastseen": "",
    "description": "A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when using libgcrypt, which impacts application stability and availability.",
    "published": "2025-09-09T11:55:39.036Z",
    "modified": "2025-09-09T11:55:39.036Z",
    "type": "cve",
    "title": "Libssh: memory exhaustion via repeated key exchange in libssh",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2025-8277\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2383888",
    "id": "CVE-2025-8277",
    "bulletinFamily": "",
    "cwe": [
        "CWE-401"
    ],
    "cvelist": null,
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    "cvss": {
        "score": 3.1,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
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        "privilegesRequired": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "Red Hat Enterprise Linux 10",
    "version": "",
    "vendor": "Red Hat",
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}