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CVE-2019-11596

26
FAUCET Score

CVE-2019-11596 is a Denial of Service vulnerability affecting Memcached versions prior to 1.5.14, including Canonical Ubuntu Linux distributions. It stems from a NULL pointer dereference in the "lru mode" and "lru temp_ttl" commands, triggered by specially crafted lru command messages. With a CVSS score of 7.5 (High), this vulnerability can be exploited remotely with low attack complexity, leading to a complete service disruption. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.5.14CPE matchmatch criteria
cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
18.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
19.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.96%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0296 is in the 75th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: memcached-0:1.5.9-3.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens)Fixed in: memcached-0:1.4.39-3.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUSFixed in: memcached-0:1.4.39-3.el7ost
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 14 (Rocky)Fixed in: memcached
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 10 (Newton)Fixed in: memcached

Vendor Advisories (1)

redhatCVE-2019-11596Moderate

memcached: null-pointer dereference in "lru mode" and "lru temp_ttl" causing denial of service

Apr 10, 2019

References

lists.opensuse.org / opensuse-security-announce/2020-05/msg00060.html
github.com / memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02
PatchThird Party Advisory
github.com / memcached/memcached/compare/ee1cfe3...50bdc9f
Patch
github.com / memcached/memcached/issues/474
ExploitThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/UUE3QBMP5UWTXMPKJREUICH6DIK6SOBX
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/Y2CCWRM4LHB253KG5SPOKRVDCXQX5VZR
usn.ubuntu.com / 3963-1
Third Party Advisory