HighFix available
curl — security advisory
During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.
- Products
- curl
- Affected versions
- 8.14.1-2ubuntu1, 8.17.0-1ubuntu1, 8.18.0-1ubuntu1, 8.18.0-1ubuntu2, 8.18.0-1ubuntu2.1, 8.18.0-1ubuntu2.2, 8.18.0-1ubuntu2.3, 8.18.0-1ubuntu2.4, 8.18.0-1ubuntu2.5, 8.18.0-1ubuntu2.7, 8.20.0-2ubuntu1, 8.20.0-2ubuntu10, 8.20.0-2ubuntu11, 8.20.0-2ubuntu3
- Fixed versions
- 8.18.0-1ubuntu2.8, 8.20.0-2ubuntu11.1
- CVEs
- CVE-2026-92392
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 08:45 UTC · Revision 1
Source evidence
During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.
osv:UBUNTU-CVE-2026-92392
curl
Fixed versions: 8.20.0-2ubuntu11.1
curl
Fixed versions: 8.18.0-1ubuntu2.8
Complete source record
{
"id": "b0dcb624953c0513767d6e34f5e424138e1a7ae7802dd00b5ef8c135038cbb64",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-92392",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-92392",
"summary": "During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.",
"evidence": "osv:UBUNTU-CVE-2026-92392",
"products": [
{
"name": {
"value": "curl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.20.0-2ubuntu11.1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "8.18.0-1ubuntu2",
"evidence": "/affected/0/versions"
},
{
"value": "8.20.0-2ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "8.20.0-2ubuntu3",
"evidence": "/affected/0/versions"
},
{
"value": "8.20.0-2ubuntu10",
"evidence": "/affected/0/versions"
},
{
"value": "8.20.0-2ubuntu11",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "curl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.18.0-1ubuntu2.8",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "8.14.1-2ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "8.17.0-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu2.1",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu2.2",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu2.3",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu2.4",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu2.5",
"evidence": "/affected/1/versions"
},
{
"value": "8.18.0-1ubuntu2.7",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-92392",
"aliases": [
"UBUNTU-CVE-2026-92392"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "high"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.20.0-2ubuntu11.1"
}
]
}
],
"package": {
"name": "curl",
"purl": "pkg:deb/ubuntu/curl?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"8.18.0-1ubuntu2",
"8.20.0-2ubuntu1",
"8.20.0-2ubuntu3",
"8.20.0-2ubuntu10",
"8.20.0-2ubuntu11"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92392.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "curl",
"binary_version": "8.20.0-2ubuntu11.1"
},
{
"binary_name": "libcurl3t64-gnutls",
"binary_version": "8.20.0-2ubuntu11.1"
},
{
"binary_name": "libcurl4t64",
"binary_version": "8.20.0-2ubuntu11.1"
}
],
"availability": "No subscription required",
"priority_reason": "Upstream defined this as high severity"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.18.0-1ubuntu2.8"
}
]
}
],
"package": {
"name": "curl",
"purl": "pkg:deb/ubuntu/curl?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"8.14.1-2ubuntu1",
"8.17.0-1ubuntu1",
"8.18.0-1ubuntu1",
"8.18.0-1ubuntu2",
"8.18.0-1ubuntu2.1",
"8.18.0-1ubuntu2.2",
"8.18.0-1ubuntu2.3",
"8.18.0-1ubuntu2.4",
"8.18.0-1ubuntu2.5",
"8.18.0-1ubuntu2.7"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92392.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "curl",
"binary_version": "8.18.0-1ubuntu2.8"
},
{
"binary_name": "libcurl3t64-gnutls",
"binary_version": "8.18.0-1ubuntu2.8"
},
{
"binary_name": "libcurl4t64",
"binary_version": "8.18.0-1ubuntu2.8"
}
],
"availability": "No subscription required",
"priority_reason": "Upstream defined this as high severity"
}
}
],
"modified": "2026-10-19T23:42:06.992990872Z",
"provider": "osv",
"upstream": [
"CVE-2026-92392"
],
"references": [
"https://ubuntu.com/security/CVE-2026-92392",
"https://www.cve.org/CVERecord?id=CVE-2026-92392",
"https://curl.se/docs/CVE-2026-92392.html",
"https://ubuntu.com/security/notices/USN-8927-1",
"https://ubuntu.com/security/notices/USN-8927-2"
]
},
"related_cves": [
{
"value": "CVE-2026-92392",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 376852,
"published_at": "2026-10-14T06:00:00+00:00"
}