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CVE-2018-1000127

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free...

7.5 HighFix available

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

2.27%Up 0.6 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Record
CVE-2018-1000127
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-190, CWE-667
Updated
2026-11-02
CVE List No score

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Record
CVE-2018-1000127
Updated
2026-11-02
EUVDEUVD-2018-1850 No score

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Record
EUVD-2018-1850
Updated
2026-11-03
GitHub AdvisoriesGHSA-xfxv-84p3-w8rg 7.5

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free...

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Record
GHSA-xfxv-84p3-w8rg
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-190
Updated
2026-11-02
OSV 7.5

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Record
CVE-2018-1000127
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-1000127 7.5

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Record
DEBIAN-CVE-2018-1000127
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVRHSA-2018:2290 6.5

Red Hat Security Advisory: memcached security update

Record
RHSA-2018:2290
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2018-1000127 7.5

memcached version prior to 1.4.37 contains an Integer Overflow vulnerability in items.c:item_free() that can result in data corruption and deadlocks due to items existing in hash table being reused from free list. This attack appear to be exploitable via network connectivity to the memcached service. This vulnerability appears to have been fixed in 1.4.37 and later.

Record
UBUNTU-CVE-2018-1000127
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:11045-1 No score

memcached-1.6.9-2.3 on GA media

These are all security issues fixed in the memcached-1.6.9-2.3 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11045-1
Updated
2026-11-02
OSVUSN-3601-1 No score

memcached vulnerability

It was discovered that Memcached incorrectly handled reusing certain items. A remote attacker could possibly use this issue to cause Memcached to crash, resulting in a denial of service.

Record
USN-3601-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
memcached
Debian:12
 before 1.5.0-1
1.5.0-1
memcached
Debian:13
 before 1.5.0-1
1.5.0-1
memcached
Debian:14
 before 1.5.0-1
1.5.0-1
memcached
Debian:7
 before 1.4.13-0.2+deb7u4, plus listed versions
1.4.13-0.21.4.13-0.2+deb7u11.4.13-0.2+deb7u21.4.13-0.2+deb7u3
1.4.13-0.2+deb7u4
memcached
Debian:8
From an advisory covering 3 CVEs
 before 1.4.21-1.1+deb8u2, plus listed versions
1.4.21-1.11.4.21-1.1+deb8u1
1.4.21-1.1+deb8u2
memcached
Debian:9
From an advisory covering 3 CVEs
 before 1.4.33-1+deb9u1, plus listed versions
1.4.33-1
1.4.33-1+deb9u1
memcached
Red Hat:openstack:10::el7
 before 0:1.4.39-2.el7ost
0:1.4.39-2.el7ost
memcached-debuginfo
Red Hat:openstack:10::el7
 before 0:1.4.39-2.el7ost
0:1.4.39-2.el7ost
memcached
Ubuntu:14.04:LTS
 before 1.4.14-0ubuntu9.3, plus listed versions
1.4.14-0ubuntu41.4.14-0ubuntu81.4.14-0ubuntu91.4.14-0ubuntu9.11.4.14-0ubuntu9.2
1.4.14-0ubuntu9.3
memcached
Ubuntu:16.04:LTS
 before 1.4.25-2ubuntu1.4, plus listed versions
1.4.24-2ubuntu11.4.25-1ubuntu21.4.25-2ubuntu11.4.25-2ubuntu1.21.4.25-2ubuntu1.3
1.4.25-2ubuntu1.4
memcached
openSUSE:Tumbleweed
From an advisory covering 4 CVEs
 before 1.6.9-2.3
1.6.9-2.3

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-1000127 is a high vulnerability (CVSS 7.5) in Memcached, published March 13, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.27%, the 83rd percentile. Fixed in memcached 1.5.0-1.

References

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