ubuntu-cve-2026-47784
Vulnerability from osv_ubuntu
Published
2026-05-20 07:16
Modified
2026-05-27 13:58
Summary
Details
In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.
Severity
8.1 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.4.25-2ubuntu1.5+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached@1.4.25-2ubuntu1.5+esm1?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.24-2ubuntu1",
"1.4.25-1ubuntu2",
"1.4.25-2ubuntu1",
"1.4.25-2ubuntu1.2",
"1.4.25-2ubuntu1.3",
"1.4.25-2ubuntu1.4",
"1.4.25-2ubuntu1.5",
"1.4.25-2ubuntu1.5+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.5.6-0ubuntu1.2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached@1.5.6-0ubuntu1.2+esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.33-1ubuntu3",
"1.5.4-1ubuntu2",
"1.5.4-1ubuntu3",
"1.5.6-0ubuntu1",
"1.5.6-0ubuntu1.1",
"1.5.6-0ubuntu1.2",
"1.5.6-0ubuntu1.2+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.5.22-2ubuntu0.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached@1.5.22-2ubuntu0.3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.5.10-0ubuntu3",
"1.5.10-0ubuntu4",
"1.5.19-2",
"1.5.20-1",
"1.5.22-1ubuntu1",
"1.5.22-2",
"1.5.22-2ubuntu0.1",
"1.5.22-2ubuntu0.2",
"1.5.22-2ubuntu0.3"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.6.14-1ubuntu0.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached@1.6.14-1ubuntu0.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.14-1ubuntu0.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.9+dfsg-1build1",
"1.6.12+dfsg-2ubuntu1",
"1.6.12+dfsg-3",
"1.6.12+dfsg-4",
"1.6.13-1",
"1.6.14-1",
"1.6.14-1ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.6.24-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached@1.6.24-1ubuntu0.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.24-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.21-1",
"1.6.22-1",
"1.6.23-1",
"1.6.24-1build1",
"1.6.24-1build3"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.6.38-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached@1.6.38-1ubuntu0.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.38-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.37-1",
"1.6.38-1",
"1.6.38-1build1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.6.40-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached@1.6.40-1ubuntu0.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.40-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.38-1build1",
"1.6.39-2",
"1.6.40-1"
]
}
],
"aliases": [],
"details": "In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.",
"id": "UBUNTU-CVE-2026-47784",
"modified": "2026-05-27T13:58:03Z",
"published": "2026-05-20T07:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-47784"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-47784"
},
{
"type": "REPORT",
"url": "https://github.com/memcached/memcached/compare/1.6.41...1.6.42"
},
{
"type": "REPORT",
"url": "https://github.com/memcached/memcached/wiki/ReleaseNotes1642"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8320-1"
}
],
"related": [
"USN-8320-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-47784"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
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- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
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