What’s Vulnerable › Vulnerabilities

CVE-2019-11596

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-04-29 · updated 2026-06-17
• Weakness: CWE-476

Description

In memcached before 1.5.14, a NULL pointer dereference was found in the "lru mode" and "lru temp_ttl" commands. This causes a denial of service when parsing crafted lru command messages in process_lru_command in memcached.c.

Affected products

• Canonical Ubuntu Linux: 18.04, 18.10, 19.04
• Memcached: before 1.5.14 — fixed in 1.5.14

How to fix

Upgrade to a fixed version: Memcached 1.5.14. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00060.html
• https://github.com/memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02
• https://github.com/memcached/memcached/compare/ee1cfe3...50bdc9f
• https://github.com/memcached/memcached/issues/474
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UUE3QBMP5UWTXMPKJREUICH6DIK6SOBX/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y2CCWRM4LHB253KG5SPOKRVDCXQX5VZR/
• https://usn.ubuntu.com/3963-1/
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00060.html
• https://github.com/memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02
• https://github.com/memcached/memcached/compare/ee1cfe3...50bdc9f
• https://github.com/memcached/memcached/issues/474
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UUE3QBMP5UWTXMPKJREUICH6DIK6SOBX/

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