CVE catalog

CVE-2017-9951

memcached: CVE-2017-9951

Severity: Critical · CVSS 9.1CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published: Jul 17, 2017, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 4.17% · Oct 25, 2026

The try_read_command function in memcached.c in memcached before 1.4.39 allows remote attackers to cause a denial of service (segmentation fault) via a request to add/set a key, which makes a comparison between signed and unsigned int and triggers a heap-based buffer over-read. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-8705.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	memcached	sid	`1.6.45-1`	fixed
Debian	memcached	forky	`1.6.45-1`	fixed
Debian	memcached	trixie	`1.6.38-1`	fixed
Debian	memcached	bookworm	`1.6.18-1`	fixed
Debian	memcached	bookworm-security	`1.6.18-1+deb12u1`	fixed
Alpine	memcached	3.3	`1.4.33-r1`	fixed
Alpine	memcached	3.4	`1.4.33-r1`	fixed
Alpine	memcached	3.5	`1.4.33-r1`	fixed
Alpine	memcached	3.6	`1.4.36-r1`	fixed
Ubuntu	memcached	14.04	`1.4.14-0ubuntu4`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu8`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu9`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu9.1`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu9.2`	fixed
Ubuntu	memcached	16.04	`1.4.24-2ubuntu1`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-1ubuntu2`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-2ubuntu1`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-2ubuntu1.2`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-2ubuntu1.3`	fixed
Ubuntu	memcached	14.04	`1.4.14-0ubuntu4`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu8`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu9`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu9.1`	vulnerable
Ubuntu	memcached	14.04	`1.4.14-0ubuntu9.2`	fixed
Ubuntu	memcached	16.04	`1.4.24-2ubuntu1`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-1ubuntu2`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-2ubuntu1`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-2ubuntu1.2`	vulnerable
Ubuntu	memcached	16.04	`1.4.25-2ubuntu1.3`	fixed
Opensuse	memcached	tumbleweed	`1.6.9-2.3`	fixed
Suse	memcached	linux enterprise server for raspberry pi 12 sp2	`1.4.39-4.3.1`	fixed
Suse	memcached	linux enterprise software development kit 12 sp2	`1.4.39-4.3.1`	fixed
Suse	memcached	linux enterprise server 12 sp2	`1.4.39-4.3.1`	fixed
Suse	memcached	linux enterprise server for sap applications 12 sp2	`1.4.39-4.3.1`	fixed
Suse	memcached	linux enterprise server 12 sp3	`1.4.39-4.3.1`	fixed
Suse	memcached	linux enterprise server for sap applications 12 sp3	`1.4.39-4.3.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	memcached	source	sid	`1.5.0-1`	not yet assigned	Not reported	[868701]
Debian	memcached	source	forky	`1.5.0-1`	not yet assigned	Not reported	[868701]
Debian	memcached	source	trixie	`1.5.0-1`	not yet assigned	Not reported	[868701]
Debian	memcached	source	bookworm	`1.5.0-1`	not yet assigned	Not reported	[868701]
Alpine	memcached	apk	3.3	`1.4.33-r1`	Not reported	ALPINE-CVE-2017-9951	Not reported
Alpine	memcached	apk	3.4	`1.4.33-r1`	Not reported	ALPINE-CVE-2017-9951	Not reported
Alpine	memcached	apk	3.5	`1.4.33-r1`	Not reported	ALPINE-CVE-2017-9951	Not reported
Alpine	memcached	apk	3.6	`1.4.36-r1`	Not reported	ALPINE-CVE-2017-9951	Not reported
Ubuntu	memcached	deb	14.04	`1.4.14-0ubuntu9.2`	Not reported	USN-3588-1	Not reported
Ubuntu	memcached	deb	16.04	`1.4.25-2ubuntu1.3`	Not reported	USN-3588-1	Not reported
Ubuntu	memcached	deb	14.04	`1.4.14-0ubuntu9.2`	Not reported	UBUNTU-CVE-2017-9951	Not reported
Ubuntu	memcached	deb	16.04	`1.4.25-2ubuntu1.3`	Not reported	UBUNTU-CVE-2017-9951	Not reported
Opensuse	memcached	rpm	tumbleweed	`1.6.9-2.3`	Not reported	OPENSUSE-SU-2024:11045-1	Not reported
Suse	memcached	rpm	linux enterprise server for raspberry pi 12 sp2	`1.4.39-4.3.1`	Not reported	SUSE-SU-2018:0839-1	Not reported
Suse	memcached	rpm	linux enterprise software development kit 12 sp2	`1.4.39-4.3.1`	Not reported	SUSE-SU-2018:0839-1	Not reported
Suse	memcached	rpm	linux enterprise server 12 sp2	`1.4.39-4.3.1`	Not reported	SUSE-SU-2018:0839-1	Not reported
Suse	memcached	rpm	linux enterprise server for sap applications 12 sp2	`1.4.39-4.3.1`	Not reported	SUSE-SU-2018:0839-1	Not reported
Suse	memcached	rpm	linux enterprise server 12 sp3	`1.4.39-4.3.1`	Not reported	SUSE-SU-2018:0839-1	Not reported
Suse	memcached	rpm	linux enterprise server for sap applications 12 sp3	`1.4.39-4.3.1`	Not reported	SUSE-SU-2018:0839-1	Not reported

[Debian bug #868701]

OpenFactory catalog packages

[openSUSE Tumbleweed]

[memcached-devel]Unknown
Source package: [memcached]
Details (1)
- 1.6.45-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.6.9-2.3
  Version impact unknown
  dsa · memcached · opensuse · tumbleweed
[memcached]Fixed
Source package: [memcached]
Details (1)
- 1.6.45-1.1 · x86_64 · tumbleweed
  Fixed · Fixed: 1.6.9-2.3
  dsa · memcached · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[memcached]Fixed
Details (2)
- 1.6.18-1 · amd64 · bookworm
  Fixed · Fixed: 1.5.0-1
  dsa · memcached · debian · bookworm; dsa · memcached · debian · 12
- 1.6.18-1 · arm64 · bookworm
  Fixed · Fixed: 1.5.0-1
  dsa · memcached · debian · bookworm; dsa · memcached · debian · 12

[Debian 13 (Trixie)]

[memcached]Fixed
Details (2)
- 1.6.38-1 · amd64 · trixie
  Fixed · Fixed: 1.5.0-1
  dsa · memcached · debian · 13
- 1.6.38-1 · arm64 · trixie
  Fixed · Fixed: 1.5.0-1
  dsa · memcached · debian · 13

Observed: Oct 23, 2026, 5:32:06 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]