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{"bugzilla": {"description": "libxfonts2: libXfont2: Privilege Escalation via Heap Buffer Overflow in Font Server Client", "id": "2509622", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2509622"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["A flaw was found in the libXfont2 font-server client. This heap buffer overflow vulnerability allows a malicious font server to send specially crafted glyph data. The fs_read_glyphs() function fails to properly validate the total size of the incoming data, leading to an overwrite of memory beyond the intended buffer. If the X server runs as a privileged user, this could result in privilege escalation, allowing an attacker to gain higher access. If the X server runs as an unprivileged user, it could lead to a denial of service, causing the system to crash."], "name": "CVE-2026-44950", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libXfont2", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-05T10:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-44950\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-44950"], "statement": "This is an Important flaw. A heap buffer overflow in the `libXfont2` font server client can be triggered by a malicious font server. If the X server runs as root, this could lead to privilege escalation; otherwise, it results in a denial of service. Red Hat Enterprise Linux typically runs the X server as an unprivileged user, mitigating the privilege escalation risk but still allowing for denial of service.", "threat_severity": "Important"}