---
title: "CVE-2010-1636\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2010-1636?format=md
keywords: index, follow
---

# CVE-2010-1636

Publication date 7 June 2010

Last updated 24 July 2024

---

Ubuntu priority

**Low**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

The btrfs\_ioctl\_clone function in fs/btrfs/ioctl.c in the btrfs
functionality in the Linux kernel 2.6.29 through 2.6.32, and possibly other
versions, does not ensure that a cloned file descriptor has been opened for
reading, which allows local users to read sensitive information from a
write-only file descriptor.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2010-1636?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| linux | 10.04 LTS lucid | Fixed 2.6.32-23.37 |
| 9.10 karmic | Fixed 2.6.31-22.61 |
| 9.04 jaunty | Not affected |
| 8.04 LTS hardy | Not affected |
| 6.06 LTS dapper | Not in release |
| linux-source-2.6.15 | 10.04 LTS lucid | Not in release |
| 9.10 karmic | Not in release |
| 9.04 jaunty | Not in release |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2010-1636?format=md#patch-details)

## Notes

---

### [smb](https://launchpad.net/~smb)

No btrfs before Karmic

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| linux | * Upstream:   <http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=5dc6416414fb3ec6e2825fd4d20c8bf1d7fe0395> * Karmic:   <http://chinstrap.ubuntu.com/~smb/CVEs/CVE-2010-1636/patches/karmic/linux/0001-Btrfs-check-for-read-permission-on-src-file-in-the-clo.txt> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-1636)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2010-1636)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2010-1636)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2010-1636)

### Related Ubuntu Security Notices (USN)

+ [USN-966-1](https://usn.ubuntu.com/USN-966-1)
+ Linux kernel vulnerabilities
+ 4 August 2010

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2010-1636>