UnratedFix available
tigervnc: Fix of 2 CVEs
Type: advisorySources: OSV
- CVE-2026-50262: fix reversed request length check in GLX ChangeDrawableAttributes in the bundled xorg-x11-server source - CVE-2026-50263: fix use-after-free of the screen private in ScreenSaver CreateSaverWindow() in the bundled xorg-x11-server source - CVE-2026-55999: fix heap buffer overflow in glamor_font_get() in the bundled xorg-x11-server source - Dropped the local xorg-CVE-2026-50256/50257/50258/50259/50260/50261 patches and require xorg-x11-server-source >= 1.20.4-99.el7_9.tuxcare.els14 instead; those fixes are now carried by the xorg-x11-server source package, and applying them again here failed %prep
- Products
- tigervnc, tigervnc-icons, tigervnc-license, tigervnc-server, tigervnc-server-applet, tigervnc-server-minimal, tigervnc-server-module
- Affected versions
- Not specified
- Fixed versions
- 1.8.0-33.0.11.el7_9.tuxcare.els2
- CVEs
- CVE-2026-50256, CVE-2026-50262, CVE-2026-50263, CVE-2026-55999
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:52 UTC · Revision 1
Source evidence
- CVE-2026-50262: fix reversed request length check in GLX ChangeDrawableAttributes in the bundled xorg-x11-server source - CVE-2026-50263: fix use-after-free of the screen private in ScreenSaver CreateSaverWindow() in the bundled xorg-x11-server source - CVE-2026-55999: fix heap buffer overflow in glamor_font_get() in the bundled xorg-x11-server source - Dropped the local xorg-CVE-2026-50256/50257/50258/50259/50260/50261 patches and require xorg-x11-server-source >= 1.20.4-99.el7_9.tuxcare.els14 instead; those fixes are now carried by the xorg-x11-server source package, and applying them again here failed %prep
osv:CLSA-2026-1791120339
tigervnc
Fixed versions: 1.8.0-33.0.11.el7_9.tuxcare.els2
tigervnc-icons
Fixed versions: 1.8.0-33.0.11.el7_9.tuxcare.els2
tigervnc-license
Fixed versions: 1.8.0-33.0.11.el7_9.tuxcare.els2
tigervnc-server
Fixed versions: 1.8.0-33.0.11.el7_9.tuxcare.els2
tigervnc-server-applet
Fixed versions: 1.8.0-33.0.11.el7_9.tuxcare.els2
tigervnc-server-minimal
Fixed versions: 1.8.0-33.0.11.el7_9.tuxcare.els2
tigervnc-server-module
Fixed versions: 1.8.0-33.0.11.el7_9.tuxcare.els2
Complete source record
{
"id": "2575105e6bd5c09d4f913404cc705c9a0efd53fb849c9ad48c631ae706e9303d",
"url": "https://osv.dev/vulnerability/CLSA-2026-1791120339",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "tigervnc: Fix of 2 CVEs",
"summary": "- CVE-2026-50262: fix reversed request length check in GLX ChangeDrawableAttributes in the bundled xorg-x11-server source - CVE-2026-50263: fix use-after-free of the screen private in ScreenSaver CreateSaverWindow() in the bundled xorg-x11-server source - CVE-2026-55999: fix heap buffer overflow in glamor_font_get() in the bundled xorg-x11-server source - Dropped the local xorg-CVE-2026-50256/50257/50258/50259/50260/50261 patches and require xorg-x11-server-source >= 1.20.4-99.el7_9.tuxcare.els14 instead; those fixes are now carried by the xorg-x11-server source package, and applying them again here failed %prep",
"evidence": "osv:CLSA-2026-1791120339",
"products": [
{
"name": {
"value": "tigervnc",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.0-33.0.11.el7_9.tuxcare.els2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-icons",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.0-33.0.11.el7_9.tuxcare.els2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-license",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.0-33.0.11.el7_9.tuxcare.els2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-server",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.0-33.0.11.el7_9.tuxcare.els2",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-server-applet",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.0-33.0.11.el7_9.tuxcare.els2",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-server-minimal",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.0-33.0.11.el7_9.tuxcare.els2",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-server-module",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.0-33.0.11.el7_9.tuxcare.els2",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1791120339",
"aliases": [
"CLSA-2026-1791120339"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-33.0.11.el7_9.tuxcare.els2"
}
]
}
],
"package": {
"name": "tigervnc",
"purl": "pkg:rpm/tuxcare/tigervnc?distro=centos-7",
"ecosystem": "TuxCare:CentOS:7"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791120339.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-33.0.11.el7_9.tuxcare.els2"
}
]
}
],
"package": {
"name": "tigervnc-icons",
"purl": "pkg:rpm/tuxcare/tigervnc-icons?distro=centos-7",
"ecosystem": "TuxCare:CentOS:7"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791120339.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-33.0.11.el7_9.tuxcare.els2"
}
]
}
],
"package": {
"name": "tigervnc-license",
"purl": "pkg:rpm/tuxcare/tigervnc-license?distro=centos-7",
"ecosystem": "TuxCare:CentOS:7"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791120339.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-33.0.11.el7_9.tuxcare.els2"
}
]
}
],
"package": {
"name": "tigervnc-server",
"purl": "pkg:rpm/tuxcare/tigervnc-server?distro=centos-7",
"ecosystem": "TuxCare:CentOS:7"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791120339.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-33.0.11.el7_9.tuxcare.els2"
}
]
}
],
"package": {
"name": "tigervnc-server-applet",
"purl": "pkg:rpm/tuxcare/tigervnc-server-applet?distro=centos-7",
"ecosystem": "TuxCare:CentOS:7"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791120339.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-33.0.11.el7_9.tuxcare.els2"
}
]
}
],
"package": {
"name": "tigervnc-server-minimal",
"purl": "pkg:rpm/tuxcare/tigervnc-server-minimal?distro=centos-7",
"ecosystem": "TuxCare:CentOS:7"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791120339.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.0-33.0.11.el7_9.tuxcare.els2"
}
]
}
],
"package": {
"name": "tigervnc-server-module",
"purl": "pkg:rpm/tuxcare/tigervnc-server-module?distro=centos-7",
"ecosystem": "TuxCare:CentOS:7"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791120339.json"
}
}
],
"modified": "2026-10-26T09:43:36.924459082Z",
"provider": "osv",
"upstream": [
"CVE-2026-50256",
"CVE-2026-50262",
"CVE-2026-50263",
"CVE-2026-55999"
],
"references": [
"https://errata.tuxcare.com/els_os/centos7els/CLSA-2026-1791120339.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-50262",
"https://nvd.nist.gov/vuln/detail/CVE-2026-50263"
]
},
"related_cves": [
{
"value": "CVE-2026-50256",
"evidence": "/upstream"
},
{
"value": "CVE-2026-50262",
"evidence": "/upstream"
},
{
"value": "CVE-2026-50263",
"evidence": "/upstream"
},
{
"value": "CVE-2026-55999",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 450029,
"published_at": "2026-10-16T00:04:15+00:00"
}