{"id":"CLSA-2026-1785917589","summary":"tigervnc: Fix of 6 CVEs","details":"- CVE-2026-50256: fix stack buffer overflow in font alias resolution in the\n  bundled xorg-x11-server source by raising XLFDMAXFONTNAMELEN to libXfont2's\n  MAXFONTNAMELEN and rejecting over-long resolved names\n- CVE-2026-50257: fix use-after-free in miSyncDestroyFence() in the bundled\n  xorg-x11-server source\n- CVE-2026-50258: reject XKB key types whose numLevels exceeds\n  XkbMaxShiftLevel in the bundled xorg-x11-server source to prevent a stack\n  buffer overflow in XkbKeyTypesForCoreSymbols()\n- CVE-2026-50259: clamp nMaps to the mapWidths[] buffer size in\n  CheckKeyTypes() in the bundled xorg-x11-server source to prevent a stack\n  buffer overflow from XkbSetMap requests\n- CVE-2026-50260: fix use-after-free in FreeCounter() in the bundled\n  xorg-x11-server source\n- CVE-2026-50261: fix use-after-free in SyncChangeCounter() in the bundled\n  xorg-x11-server source by restarting trigger list iteration after a\n  trigger fires\n- Dropped the local xorg-CVE-2026-33999/34000/34001/34002/34003 patches and\n  require xorg-x11-server-source \u003e= 1.20.4-99.el7_9.tuxcare.els10 instead;\n  those fixes are now carried by the xorg-x11-server source package, and\n  applying them again here failed %prep","modified":"2026-10-26T09:43:45.574385951Z","published":"2026-08-05T08:13:26Z","upstream":["CVE-2026-33999","CVE-2026-50256","CVE-2026-50257","CVE-2026-50258","CVE-2026-50259","CVE-2026-50260","CVE-2026-50261"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/oraclelinux7els/CLSA-2026-1785917589.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50256"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50257"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50258"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50259"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50260"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50261"}],"affected":[{"package":{"name":"tigervnc","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tigervnc?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-33.0.7.el7_9.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1785917589.json"}},{"package":{"name":"tigervnc-icons","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tigervnc-icons?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-33.0.7.el7_9.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1785917589.json"}},{"package":{"name":"tigervnc-license","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tigervnc-license?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-33.0.7.el7_9.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1785917589.json"}},{"package":{"name":"tigervnc-server","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tigervnc-server?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-33.0.7.el7_9.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1785917589.json"}},{"package":{"name":"tigervnc-server-applet","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tigervnc-server-applet?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-33.0.7.el7_9.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1785917589.json"}},{"package":{"name":"tigervnc-server-minimal","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tigervnc-server-minimal?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-33.0.7.el7_9.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1785917589.json"}},{"package":{"name":"tigervnc-server-module","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/tigervnc-server-module?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-33.0.7.el7_9.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1785917589.json"}}],"schema_version":"1.9.0"}