HighFix available
webkit2gtk, wpewebkit — security advisory
A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.
- Products
- webkit2gtk, wpewebkit
- Affected versions
- Not specified
- Fixed versions
- 2.32.3-1
- CVEs
- CVE-2021-21779
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 01:41 UTC · Revision 1
Source evidence
A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.
osv:DEBIAN-CVE-2021-21779
webkit2gtk
Fixed versions: 2.32.3-1
webkit2gtk
Fixed versions: 2.32.3-1
webkit2gtk
Fixed versions: 2.32.3-1
wpewebkit
Fixed versions: 2.32.3-1
wpewebkit
Fixed versions: 2.32.3-1
wpewebkit
Fixed versions: 2.32.3-1
Complete source record
{
"id": "a1b40258eb06d6a4e1ca7b236b15f4bbaa763c057f7a25711883a9fbec42b49c",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-21779",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2021-21779",
"summary": "A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.",
"evidence": "osv:DEBIAN-CVE-2021-21779",
"products": [
{
"name": {
"value": "webkit2gtk",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.32.3-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "webkit2gtk",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.32.3-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "webkit2gtk",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.32.3-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "wpewebkit",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.32.3-1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "wpewebkit",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.32.3-1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "wpewebkit",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.32.3-1",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2021-21779",
"aliases": [
"DEBIAN-CVE-2021-21779"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.32.3-1"
}
]
}
],
"package": {
"name": "webkit2gtk",
"purl": "pkg:deb/debian/webkit2gtk?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-21779.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.32.3-1"
}
]
}
],
"package": {
"name": "webkit2gtk",
"purl": "pkg:deb/debian/webkit2gtk?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-21779.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.32.3-1"
}
]
}
],
"package": {
"name": "webkit2gtk",
"purl": "pkg:deb/debian/webkit2gtk?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-21779.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.32.3-1"
}
]
}
],
"package": {
"name": "wpewebkit",
"purl": "pkg:deb/debian/wpewebkit?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-21779.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.32.3-1"
}
]
}
],
"package": {
"name": "wpewebkit",
"purl": "pkg:deb/debian/wpewebkit?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-21779.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.32.3-1"
}
]
}
],
"package": {
"name": "wpewebkit",
"purl": "pkg:deb/debian/wpewebkit?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-21779.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:04:49.405391179Z",
"provider": "osv",
"upstream": [
"CVE-2021-21779"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2021-21779"
]
},
"related_cves": [
{
"value": "CVE-2021-21779",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 423983,
"published_at": "2021-07-08T12:15:09.903+00:00"
}