UBUNTU-CVE-2026-90698
A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.
UBUNTU-CVE-2026-90698
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:UBUNTU-CVE-2026-90698
memcached
Source reference: /affected/0/package/name
- Affected versions
- 1.6.9+dfsg-1build1
Source reference:
/affected/0/versions1.6.12+dfsg-2ubuntu1Source reference:
/affected/0/versions1.6.12+dfsg-3Source reference:
/affected/0/versions1.6.12+dfsg-4Source reference:
/affected/0/versions1.6.13-1Source reference:
/affected/0/versions1.6.14-1Source reference:
/affected/0/versions1.6.14-1ubuntu0.1Source reference:
/affected/0/versions1.6.14-1ubuntu0.2Source reference:
/affected/0/versions - Fixed versions
- 1.6.14-1ubuntu0.3
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
memcached
Source reference: /affected/1/package/name
- Affected versions
- 1.6.21-1
Source reference:
/affected/1/versions1.6.22-1Source reference:
/affected/1/versions1.6.23-1Source reference:
/affected/1/versions1.6.24-1build1Source reference:
/affected/1/versions1.6.24-1build3Source reference:
/affected/1/versions1.6.24-1ubuntu0.1Source reference:
/affected/1/versions1.6.24-1ubuntu0.2Source reference:
/affected/1/versions - Fixed versions
- 1.6.24-1ubuntu0.3
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
memcached
Source reference: /affected/2/package/name
- Affected versions
- 1.6.38-1build1
Source reference:
/affected/2/versions1.6.39-2Source reference:
/affected/2/versions1.6.40-1Source reference:
/affected/2/versions1.6.40-1ubuntu0.1Source reference:
/affected/2/versions1.6.40-1ubuntu0.2Source reference:
/affected/2/versions - Fixed versions
- 1.6.40-1ubuntu0.3
Source reference:
/affected/2/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": "1.6.14-1ubuntu0.3"
}
]
}
],
"package": {
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"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",
"1.6.14-1ubuntu0.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90698.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.6.14-1ubuntu0.3"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.24-1ubuntu0.3"
}
]
}
],
"package": {
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.6.21-1",
"1.6.22-1",
"1.6.23-1",
"1.6.24-1build1",
"1.6.24-1build3",
"1.6.24-1ubuntu0.1",
"1.6.24-1ubuntu0.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90698.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.6.24-1ubuntu0.3"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.40-1ubuntu0.3"
}
]
}
],
"package": {
"name": "memcached",
"purl": "pkg:deb/ubuntu/memcached?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.6.38-1build1",
"1.6.39-2",
"1.6.40-1",
"1.6.40-1ubuntu0.1",
"1.6.40-1ubuntu0.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90698.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "memcached",
"binary_version": "1.6.40-1ubuntu0.3"
}
],
"availability": "No subscription required"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #14642 · Revision 1
- Added to Heist Feed
- Publisher date