openssl vulnerabilities
It was discovered that OpenSSL had an inefficient algorithm in its QUIC stream reassembly implementation. A remote attacker could possibly use this issue to cause OpenSSL to use excessive CPU resources, leading to a denial of service. (CVE-2026-42772) It was discovered that OpenSSL did not properly limit memory allocated for QUIC packet buffers. A remote attacker could possibly use this issue to cause OpenSSL to use excessive memory resources, leading to a denial of service. (CVE-2026-54873)
USN-8861-1
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:USN-8861-1
openssl
Source reference: /affected/0/package/name
- Affected versions
- 3.5.3-1ubuntu2
Source reference:
/affected/0/versions3.5.5-1ubuntu1Source reference:
/affected/0/versions3.5.5-1ubuntu3Source reference:
/affected/0/versions3.5.5-1ubuntu3.2Source reference:
/affected/0/versions3.5.5-1ubuntu3.3Source reference:
/affected/0/versions3.5.5-1ubuntu3.4Source reference:
/affected/0/versions3.5.5-1ubuntu3.5Source reference:
/affected/0/versions3.5.5-1ubuntu3.6Source reference:
/affected/0/versions - Fixed versions
- 3.5.5-1ubuntu3.7
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.5-1ubuntu3.7"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:deb/ubuntu/openssl?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"3.5.3-1ubuntu2",
"3.5.5-1ubuntu1",
"3.5.5-1ubuntu3",
"3.5.5-1ubuntu3.2",
"3.5.5-1ubuntu3.3",
"3.5.5-1ubuntu3.4",
"3.5.5-1ubuntu3.5",
"3.5.5-1ubuntu3.6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8861-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-42772",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2026-54873",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libssl3t64",
"binary_version": "3.5.5-1ubuntu3.7"
},
{
"binary_name": "openssl",
"binary_version": "3.5.5-1ubuntu3.7"
},
{
"binary_name": "openssl-provider-legacy",
"binary_version": "3.5.5-1ubuntu3.7"
}
],
"availability": "No subscription required"
}
}
]- Related CVEs
- CVE-2026-42772
Source reference:
/upstreamCVE-2026-54873Source reference:
/upstream
Publisher severity
No explicit severity was provided.
- Event
- #68028 · Revision 1
- Added to Heist Feed
- Publisher date