CVE-2018-1000127
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.27% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-190, CWE-667
- Affected
- memcached/memcached · debian/debian linux · canonical/ubuntu linux · redhat/openstack
- Source
- cve@mitre.org
EPSS 2.3% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/errata/RHSA-2018:2290Third Party Advisory
- https://github.com/memcached/memcached/commit/a8c4a82787b8b6c256d61bd5c42fb7f92d1bae00Patch, Third Party Advisory
- https://github.com/memcached/memcached/issues/271Third Party Advisory
- https://github.com/memcached/memcached/wiki/ReleaseNotes1437Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00031.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3601-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4218Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2290Third Party Advisory
- https://github.com/memcached/memcached/commit/a8c4a82787b8b6c256d61bd5c42fb7f92d1bae00Patch, Third Party Advisory
- https://github.com/memcached/memcached/issues/271Third Party Advisory
- https://github.com/memcached/memcached/wiki/ReleaseNotes1437Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00031.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3601-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4218Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.