CriticalFix available
mesa — security advisory
In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca.
- Products
- mesa
- Affected versions
- 22.3.6-1+deb12u1, 25.0.7-2, 25.1.0-1, 25.1.5-1, 25.1.7-1, 25.2.0-1, 25.2.1-1, 25.2.1-2, 25.2.2-1, 25.2.3-1, 25.2.3-1~bpo13+1, 25.2.4-1, 25.2.4-1~bpo13+1, 25.2.4-1~bpo13+2, 25.2.5-1, 25.2.6-1, 25.2.6-1~bpo13+1, 25.2.7-1, 25.2.8-1, 25.2.8-2, 25.3.0-1, 25.3.0~rc1-1, 25.3.0~rc2-1, 25.3.0~rc4-1, 25.3.1-1, 25.3.2-1, 25.3.2-2, 25.3.3-1, 26.0.0-1, 26.0.0~rc3-1
- Fixed versions
- 22.3.6-1+deb12u2, 25.0.7-2+deb13u1, 26.0.1-1
- CVEs
- CVE-2026-40393
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:48 UTC · Revision 2
Source evidence
In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca.
osv:DEBIAN-CVE-2026-40393
mesa
Fixed versions: 22.3.6-1+deb12u2
mesa
Fixed versions: 25.0.7-2+deb13u1
mesa
Fixed versions: 26.0.1-1
Complete source record
{
"id": "72f157821dd5e59cdc79dc1d8ba98facb11ab84c3ae20c1fea286b2ce3ee511b",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-40393",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-40393",
"summary": "In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca.",
"evidence": "osv:DEBIAN-CVE-2026-40393",
"products": [
{
"name": {
"value": "mesa",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "22.3.6-1+deb12u2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "22.3.6-1+deb12u1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "mesa",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "25.0.7-2+deb13u1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "25.0.7-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "mesa",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "26.0.1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "25.0.7-2",
"evidence": "/affected/2/versions"
},
{
"value": "25.1.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.1.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.1.7-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.1-2",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.3-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.4-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.4-1~bpo13+2",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.6-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.7-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.2.8-2",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.0~rc1-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.0~rc2-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.0~rc4-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "25.3.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "26.0.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "26.0.0~rc3-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2026-40393",
"aliases": [
"DEBIAN-CVE-2026-40393"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "22.3.6-1+deb12u2"
}
]
}
],
"package": {
"name": "mesa",
"purl": "pkg:deb/debian/mesa?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"22.3.6-1+deb12u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40393.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "25.0.7-2+deb13u1"
}
]
}
],
"package": {
"name": "mesa",
"purl": "pkg:deb/debian/mesa?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"25.0.7-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40393.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "26.0.1-1"
}
]
}
],
"package": {
"name": "mesa",
"purl": "pkg:deb/debian/mesa?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"25.0.7-2",
"25.1.0-1",
"25.1.5-1",
"25.1.7-1",
"25.2.0-1",
"25.2.1-1",
"25.2.1-2",
"25.2.2-1",
"25.2.3-1",
"25.2.3-1~bpo13+1",
"25.2.4-1",
"25.2.4-1~bpo13+1",
"25.2.4-1~bpo13+2",
"25.2.5-1",
"25.2.6-1",
"25.2.6-1~bpo13+1",
"25.2.7-1",
"25.2.8-1",
"25.2.8-2",
"25.3.0-1",
"25.3.0~rc1-1",
"25.3.0~rc2-1",
"25.3.0~rc4-1",
"25.3.1-1",
"25.3.2-1",
"25.3.2-2",
"25.3.3-1",
"26.0.0-1",
"26.0.0~rc3-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40393.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:36.014811504Z",
"provider": "osv",
"upstream": [
"CVE-2026-40393"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-40393"
]
},
"related_cves": [
{
"value": "CVE-2026-40393",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461252,
"published_at": "2026-04-12T19:16:20.797+00:00"
}