High
libxrender — security advisory
A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.
- Products
- libxrender
- Affected versions
- 1:0.9.10-1, 1:0.9.10-1.1, 1:0.9.10-1.1build1, 1:0.9.10-1build2, 1:0.9.10-1build3, 1:0.9.10-1build4, 1:0.9.12-1, 1:0.9.12-1build1, 1:0.9.8-1, 1:0.9.8-1build0.14.04.1, 1:0.9.9-0ubuntu1, 1:0.9.9-0ubuntu1+esm1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-88807
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:30 UTC · Revision 1
Source evidence
A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.
osv:UBUNTU-CVE-2026-88807
libxrender
Fixed versions: Not specified
libxrender
Fixed versions: Not specified
libxrender
Fixed versions: Not specified
libxrender
Fixed versions: Not specified
libxrender
Fixed versions: Not specified
libxrender
Fixed versions: Not specified
libxrender
Fixed versions: Not specified
libxrender
Fixed versions: Not specified
Complete source record
{
"id": "19001f87c27095b395b93a6efc348ae5d7e7905e3bb69f1344958f16cb77d258",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-88807",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-88807",
"summary": "A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.",
"evidence": "osv:UBUNTU-CVE-2026-88807",
"products": [
{
"name": {
"value": "libxrender",
"evidence": "/affected/0/package/name"
},
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"fixed_versions": [],
"affected_versions": [
{
"value": "1:0.9.8-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:0.9.8-1build0.14.04.1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1:0.9.9-0ubuntu1",
"evidence": "/affected/1/versions"
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{
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{
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{
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{
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"evidence": "/affected/4/package/name"
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"affected_versions": [
{
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{
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"evidence": "/affected/4/versions"
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{
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{
"name": {
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{
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},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1:0.9.12-1build1",
"evidence": "/affected/6/versions"
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{
"name": {
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"evidence": "/affected/7/package/name"
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"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/7/versions"
},
{
"value": "1:0.9.12-1build1",
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]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-88807",
"aliases": [
"UBUNTU-CVE-2026-88807"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libxrender",
"purl": "pkg:deb/ubuntu/libxrender?arch=source&distro=trusty",
"ecosystem": "Ubuntu:14.04:LTS"
},
"versions": [
"1:0.9.8-1",
"1:0.9.8-1build0.14.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88807.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxrender1",
"binary_version": "1:0.9.8-1build0.14.04.1"
}
]
}
},
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/libxrender?arch=source&distro=esm-infra%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
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"1:0.9.9-0ubuntu1+esm1"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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},
{
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],
"package": {
"name": "libxrender",
"purl": "pkg:deb/ubuntu/libxrender?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1:0.9.10-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88807.json"
},
"ecosystem_specific": {
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{
"binary_name": "libxrender1",
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]
}
},
{
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"package": {
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"purl": "pkg:deb/ubuntu/libxrender?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1:0.9.10-1"
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"database_specific": {
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"ecosystem_specific": {
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"package": {
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"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1:0.9.10-1build2",
"1:0.9.10-1build3",
"1:0.9.10-1build4"
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"ecosystem": "Ubuntu:26.10"
},
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"1:0.9.12-1build1"
],
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},
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}
]
}
},
{
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"package": {
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"ecosystem": "Ubuntu:26.04:LTS"
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"versions": [
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},
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}
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}
],
"modified": "2026-10-17T13:01:15.885083434Z",
"provider": "osv",
"upstream": [
"CVE-2026-88807"
],
"references": [
"https://ubuntu.com/security/CVE-2026-88807",
"https://www.cve.org/CVERecord?id=CVE-2026-88807",
"https://gitlab.freedesktop.org/xorg/lib/libxrender/-/merge_requests/19"
]
},
"related_cves": [
{
"value": "CVE-2026-88807",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361432,
"published_at": "2026-09-21T14:17:00+00:00"
}