UnratedFix available
tigervnc: Fix of CVE-2026-50262
Type: advisorySources: OSV
- CVE-2026-50262: fix reversed request-length check in GLX __glXDisp_ChangeDrawableAttributes (and swapped variant) by reverting the mesa size-check workaround and restoring REQUEST_FIXED_SIZE / REQUEST_SIZE_MATCH in the bundled xserver GLX handlers (out-of-bounds read)
- Products
- tigervnc, tigervnc-icons, tigervnc-license, tigervnc-selinux, tigervnc-server, tigervnc-server-minimal, tigervnc-server-module
- Affected versions
- Not specified
- Fixed versions
- 1.12.0-13.el9_2.tuxcare.els26
- CVEs
- CVE-2026-50262
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:38 UTC · Revision 1
Source evidence
- CVE-2026-50262: fix reversed request-length check in GLX __glXDisp_ChangeDrawableAttributes (and swapped variant) by reverting the mesa size-check workaround and restoring REQUEST_FIXED_SIZE / REQUEST_SIZE_MATCH in the bundled xserver GLX handlers (out-of-bounds read)
osv:CLSA-2026-1782986813
tigervnc
Fixed versions: 1.12.0-13.el9_2.tuxcare.els26
tigervnc-icons
Fixed versions: 1.12.0-13.el9_2.tuxcare.els26
tigervnc-license
Fixed versions: 1.12.0-13.el9_2.tuxcare.els26
tigervnc-selinux
Fixed versions: 1.12.0-13.el9_2.tuxcare.els26
tigervnc-server
Fixed versions: 1.12.0-13.el9_2.tuxcare.els26
tigervnc-server-minimal
Fixed versions: 1.12.0-13.el9_2.tuxcare.els26
tigervnc-server-module
Fixed versions: 1.12.0-13.el9_2.tuxcare.els26
Complete source record
{
"id": "dac7f92e24ea2d5ce42940cecdacbde1e453ddebac6cc364d19525138c2b9c7a",
"url": "https://osv.dev/vulnerability/CLSA-2026-1782986813",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "tigervnc: Fix of CVE-2026-50262",
"summary": "- CVE-2026-50262: fix reversed request-length check in GLX __glXDisp_ChangeDrawableAttributes (and swapped variant) by reverting the mesa size-check workaround and restoring REQUEST_FIXED_SIZE / REQUEST_SIZE_MATCH in the bundled xserver GLX handlers (out-of-bounds read)",
"evidence": "osv:CLSA-2026-1782986813",
"products": [
{
"name": {
"value": "tigervnc",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.12.0-13.el9_2.tuxcare.els26",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-icons",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.12.0-13.el9_2.tuxcare.els26",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-license",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.12.0-13.el9_2.tuxcare.els26",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-selinux",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.12.0-13.el9_2.tuxcare.els26",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-server",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.12.0-13.el9_2.tuxcare.els26",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-server-minimal",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.12.0-13.el9_2.tuxcare.els26",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tigervnc-server-module",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.12.0-13.el9_2.tuxcare.els26",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1782986813",
"aliases": [
"CLSA-2026-1782986813"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0-13.el9_2.tuxcare.els26"
}
]
}
],
"package": {
"name": "tigervnc",
"purl": "pkg:rpm/tuxcare/tigervnc?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1782986813.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0-13.el9_2.tuxcare.els26"
}
]
}
],
"package": {
"name": "tigervnc-icons",
"purl": "pkg:rpm/tuxcare/tigervnc-icons?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1782986813.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0-13.el9_2.tuxcare.els26"
}
]
}
],
"package": {
"name": "tigervnc-license",
"purl": "pkg:rpm/tuxcare/tigervnc-license?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1782986813.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0-13.el9_2.tuxcare.els26"
}
]
}
],
"package": {
"name": "tigervnc-selinux",
"purl": "pkg:rpm/tuxcare/tigervnc-selinux?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1782986813.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0-13.el9_2.tuxcare.els26"
}
]
}
],
"package": {
"name": "tigervnc-server",
"purl": "pkg:rpm/tuxcare/tigervnc-server?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1782986813.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0-13.el9_2.tuxcare.els26"
}
]
}
],
"package": {
"name": "tigervnc-server-minimal",
"purl": "pkg:rpm/tuxcare/tigervnc-server-minimal?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1782986813.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0-13.el9_2.tuxcare.els26"
}
]
}
],
"package": {
"name": "tigervnc-server-module",
"purl": "pkg:rpm/tuxcare/tigervnc-server-module?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1782986813.json"
}
}
],
"modified": "2026-10-26T09:30:10.687136068Z",
"provider": "osv",
"upstream": [
"CVE-2026-50262"
],
"references": [
"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1782986813.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-50262"
]
},
"related_cves": [
{
"value": "CVE-2026-50262",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 446885,
"published_at": "2026-07-02T10:07:10+00:00"
}