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        "cveId": "CVE-2025-4877",
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "state": "PUBLISHED",
        "assignerShortName": "redhat",
        "dateReserved": "2025-05-16T22:23:41.045Z",
        "datePublished": "2025-08-20T12:19:18.520Z",
        "dateUpdated": "2026-08-31T11:28:35.916Z"
    },
    "containers": {
        "cna": {
            "title": "Libssh: write beyond bounds in binary to base64 conversion functions",
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                        "content": {
                            "value": "Moderate",
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                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "LOW",
                        "baseScore": 4.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
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            "descriptions": [
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                    "lang": "en",
                    "value": "There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when that happens it's possible that the program perform out of bounds write leading to a heap corruption.\nThis issue affects only 32-bits builds of libssh."
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            ],
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                            "version": "0",
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                            "versionType": "semver"
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                    "collectionURL": "https://www.libssh.org",
                    "defaultStatus": "unaffected"
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                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
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                            "version": "0:0.10.4-18.el9",
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                            "versionType": "rpm",
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                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream",
                        "cpe:/o:redhat:enterprise_linux:9::baseos"
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                    "product": "Red Hat Enterprise Linux 9",
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                    "packageName": "libssh",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10"
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                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 6",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "libssh2",
                    "defaultStatus": "unaffected",
                    "cpes": [
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                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "libssh2",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:7"
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                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
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                    "packageName": "libssh",
                    "defaultStatus": "unaffected",
                    "cpes": [
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                {
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Container Platform 4",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "openshift/ose-rhel-coreos-8",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/a:redhat:openshift:4"
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                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Container Platform 4",
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                    "packageName": "openshift/ose-rhel-coreos-9",
                    "defaultStatus": "unaffected",
                    "cpes": [
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            ],
            "references": [
                {
                    "url": "https://access.redhat.com/errata/RHSA-2026:18683",
                    "name": "RHSA-2026:18683",
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                },
                {
                    "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376193",
                    "name": "RHBZ#2376193",
                    "tags": [
                        "issue-tracking",
                        "x_refsource_REDHAT"
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                },
                {
                    "url": "https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=6fd9cc8ce3958092a1aae11f1f2e911b2747732d"
                },
                {
                    "url": "https://www.libssh.org/security/advisories/CVE-2025-4877.txt"
                }
            ],
            "datePublic": "2025-06-24T00:00:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-787",
                            "description": "Out-of-bounds Write",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "x_redhatCweChain": "CWE-787: Out-of-bounds Write",
            "timeline": [
                {
                    "lang": "en",
                    "time": "2025-07-03T18:04:11.051Z",
                    "value": "Reported to Red Hat."
                },
                {
                    "lang": "en",
                    "time": "2025-06-24T00:00:00.000Z",
                    "value": "Made public."
                }
            ],
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