CriticalFix available
firefox-esr, thunderbird — security advisory
An integer overflow vulnerability in the Skia library when allocating memory for edge builders on some systems with at least 8 GB of RAM. This results in the use of uninitialized memory, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.
- Products
- firefox-esr, thunderbird
- Affected versions
- Not specified
- Fixed versions
- 1:52.6.0-1, 52.6.0esr-1
- CVEs
- CVE-2018-5095
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:14 UTC · Revision 1
Source evidence
An integer overflow vulnerability in the Skia library when allocating memory for edge builders on some systems with at least 8 GB of RAM. This results in the use of uninitialized memory, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.
osv:DEBIAN-CVE-2018-5095
firefox-esr
Fixed versions: 52.6.0esr-1
firefox-esr
Fixed versions: 52.6.0esr-1
firefox-esr
Fixed versions: 52.6.0esr-1
thunderbird
Fixed versions: 1:52.6.0-1
thunderbird
Fixed versions: 1:52.6.0-1
thunderbird
Fixed versions: 1:52.6.0-1
Complete source record
{
"id": "2dad9c219d14c355df75d2aa3047d0c050bb3527f642c644cc3c61482c55c51a",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-5095",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-5095",
"summary": "An integer overflow vulnerability in the Skia library when allocating memory for edge builders on some systems with at least 8 GB of RAM. This results in the use of uninitialized memory, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.",
"evidence": "osv:DEBIAN-CVE-2018-5095",
"products": [
{
"name": {
"value": "firefox-esr",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "52.6.0esr-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/1/ranges"
}
],
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},
{
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},
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{
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},
{
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{
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"affected_versions": []
},
{
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],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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"events": [
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{
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],
"package": {
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"purl": "pkg:deb/debian/firefox-esr?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
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"ecosystem_specific": {
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{
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"package": {
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"ecosystem": "Debian:13"
},
"database_specific": {
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},
"ecosystem_specific": {
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{
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],
"package": {
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"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5095.json"
},
"ecosystem_specific": {
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{
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"package": {
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"ecosystem": "Debian:12"
},
"database_specific": {
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},
"ecosystem_specific": {
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}
},
{
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],
"package": {
"name": "thunderbird",
"purl": "pkg:deb/debian/thunderbird?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5095.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
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]
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],
"package": {
"name": "thunderbird",
"purl": "pkg:deb/debian/thunderbird?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5095.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:03:06.634179702Z",
"provider": "osv",
"upstream": [
"CVE-2018-5095"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-5095"
]
},
"related_cves": [
{
"value": "CVE-2018-5095",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 420453,
"published_at": "2018-06-11T21:29:12.467+00:00"
}