{"schema_version":"1.7.2","id":"OESA-2026-3466","modified":"2026-08-20T10:00:34Z","published":"2026-08-20T10:00:34Z","upstream":["CVE-2026-44950","CVE-2026-59679"],"summary":"libXfont2 security update","details":"libXfont provides the core of the legacy X11 font system, handling the index files (fonts.dir, fonts.alias, fonts.scale), the various font file formats, and rasterizing them.  contains runtime  library.\r\n\r\nSecurity Fix(es):\n\nA 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.(CVE-2026-44950)\n\nA flaw was found in the libXfont2 font-server client. A remote attacker, by operating a malicious font server, could exploit an out-of-bounds read/write vulnerability. This occurs because the client incorrectly handles font data, leading to an out-of-bounds memory access. This can lead to privilege escalation if the X server runs with root privileges, or a denial of service (crash) if it runs as an unprivileged user.(CVE-2026-59679)","affected":[{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"libXfont2","purl":"pkg:rpm/openEuler/libXfont2&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.5-6.oe2203sp4"}]}],"ecosystem_specific":{"aarch64":["libXfont2-2.0.5-6.oe2203sp4.aarch64.rpm","libXfont2-debuginfo-2.0.5-6.oe2203sp4.aarch64.rpm","libXfont2-debugsource-2.0.5-6.oe2203sp4.aarch64.rpm","libXfont2-devel-2.0.5-6.oe2203sp4.aarch64.rpm"],"noarch":["libXfont2-help-2.0.5-6.oe2203sp4.noarch.rpm"],"src":["libXfont2-2.0.5-6.oe2203sp4.src.rpm"],"x86_64":["libXfont2-2.0.5-6.oe2203sp4.x86_64.rpm","libXfont2-debuginfo-2.0.5-6.oe2203sp4.x86_64.rpm","libXfont2-debugsource-2.0.5-6.oe2203sp4.x86_64.rpm","libXfont2-devel-2.0.5-6.oe2203sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"libXfont2","purl":"pkg:rpm/openEuler/libXfont2&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.6-4.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["libXfont2-2.0.6-4.oe2403sp1.aarch64.rpm","libXfont2-debuginfo-2.0.6-4.oe2403sp1.aarch64.rpm","libXfont2-debugsource-2.0.6-4.oe2403sp1.aarch64.rpm","libXfont2-devel-2.0.6-4.oe2403sp1.aarch64.rpm"],"noarch":["libXfont2-help-2.0.6-4.oe2403sp1.noarch.rpm"],"src":["libXfont2-2.0.6-4.oe2403sp1.src.rpm"],"x86_64":["libXfont2-2.0.6-4.oe2403sp1.x86_64.rpm","libXfont2-debuginfo-2.0.6-4.oe2403sp1.x86_64.rpm","libXfont2-debugsource-2.0.6-4.oe2403sp1.x86_64.rpm","libXfont2-devel-2.0.6-4.oe2403sp1.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"libXfont2","purl":"pkg:rpm/openEuler/libXfont2&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.6-4.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["libXfont2-2.0.6-4.oe2403sp3.aarch64.rpm","libXfont2-debuginfo-2.0.6-4.oe2403sp3.aarch64.rpm","libXfont2-debugsource-2.0.6-4.oe2403sp3.aarch64.rpm","libXfont2-devel-2.0.6-4.oe2403sp3.aarch64.rpm"],"noarch":["libXfont2-help-2.0.6-4.oe2403sp3.noarch.rpm"],"src":["libXfont2-2.0.6-4.oe2403sp3.src.rpm"],"x86_64":["libXfont2-2.0.6-4.oe2403sp3.x86_64.rpm","libXfont2-debuginfo-2.0.6-4.oe2403sp3.x86_64.rpm","libXfont2-debugsource-2.0.6-4.oe2403sp3.x86_64.rpm","libXfont2-devel-2.0.6-4.oe2403sp3.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP4","name":"libXfont2","purl":"pkg:rpm/openEuler/libXfont2&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.6-4.oe2403sp4"}]}],"ecosystem_specific":{"aarch64":["libXfont2-2.0.6-4.oe2403sp4.aarch64.rpm","libXfont2-debuginfo-2.0.6-4.oe2403sp4.aarch64.rpm","libXfont2-debugsource-2.0.6-4.oe2403sp4.aarch64.rpm","libXfont2-devel-2.0.6-4.oe2403sp4.aarch64.rpm"],"noarch":["libXfont2-help-2.0.6-4.oe2403sp4.noarch.rpm"],"src":["libXfont2-2.0.6-4.oe2403sp4.src.rpm"],"x86_64":["libXfont2-2.0.6-4.oe2403sp4.x86_64.rpm","libXfont2-debuginfo-2.0.6-4.oe2403sp4.x86_64.rpm","libXfont2-debugsource-2.0.6-4.oe2403sp4.x86_64.rpm","libXfont2-devel-2.0.6-4.oe2403sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:20.03-LTS-SP4","name":"libXfont2","purl":"pkg:rpm/openEuler/libXfont2&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.4-3.oe2003sp4"}]}],"ecosystem_specific":{"aarch64":["libXfont2-2.0.4-3.oe2003sp4.aarch64.rpm","libXfont2-debuginfo-2.0.4-3.oe2003sp4.aarch64.rpm","libXfont2-debugsource-2.0.4-3.oe2003sp4.aarch64.rpm","libXfont2-devel-2.0.4-3.oe2003sp4.aarch64.rpm"],"noarch":["libXfont2-help-2.0.4-3.oe2003sp4.noarch.rpm"],"src":["libXfont2-2.0.4-3.oe2003sp4.src.rpm"],"x86_64":["libXfont2-2.0.4-3.oe2003sp4.x86_64.rpm","libXfont2-debuginfo-2.0.4-3.oe2003sp4.x86_64.rpm","libXfont2-debugsource-2.0.4-3.oe2003sp4.x86_64.rpm","libXfont2-devel-2.0.4-3.oe2003sp4.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3466"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44950"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59679"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"database_specific":{"severity":"High"}}