Libsoup: incomplete fix for cve-2026-2443: range suffix overflow in libsoup soupserver_CVE-2026-12549

{
    "lastseen": "",
    "description": "The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding.",
    "published": "2026-06-22T13:55:06.896Z",
    "modified": "2026-06-22T13:55:06.896Z",
    "type": "cve",
    "title": "Libsoup: incomplete fix for cve-2026-2443: range suffix overflow in libsoup soupserver",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2026-12549\nhttps://access.redhat.com/security/cve/cve-2026-0716\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2489999\nhttps://gitlab.gnome.org/GNOME/libsoup/-/work_items/516",
    "id": "CVE-2026-12549",
    "bulletinFamily": "",
    "cwe": [
        "CWE-805"
    ],
    "cvelist": null,
    "sourceData": "",
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    "cvss": {
        "score": 4.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Red Hat Enterprise Linux 10",
    "version": "",
    "vendor": "Red Hat",
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}