Vulnerability Description
Race condition in the tty_fasync function in drivers/char/tty_io.c in the Linux kernel before 2.6.32.6 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via unknown vectors, related to the put_tty_queue and __f_setown functions. NOTE: the vulnerability was addressed in a different way in 2.6.32.9.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 2.6.32.6 |
| Debian | Debian Linux | 5.0 |
| Canonical | Ubuntu Linux | 6.06 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=Broken Link
- http://www.debian.org/security/2010/dsa-2094Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.6Broken Link
- http://www.openwall.com/lists/oss-security/2010/06/15/2Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2010/06/15/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2010/06/15/4Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2010/06/15/5Mailing ListThird Party Advisory
- http://www.ubuntu.com/usn/USN-1000-1Third Party Advisory
- https://bugzilla.kernel.org/show_bug.cgi?id=14605Issue TrackingPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=559100Issue TrackingThird Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=Broken Link
- http://www.debian.org/security/2010/dsa-2094Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.6Broken Link
- http://www.openwall.com/lists/oss-security/2010/06/15/2Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2010/06/15/3Mailing ListThird Party Advisory
FAQ
What is CVE-2009-4895?
CVE-2009-4895 is a vulnerability with a CVSS score of 4.7 (MEDIUM). Race condition in the tty_fasync function in drivers/char/tty_io.c in the Linux kernel before 2.6.32.6 allows local users to cause a denial of service (NULL pointer dereference and system crash) or po...
How severe is CVE-2009-4895?
CVE-2009-4895 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2009-4895?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux, Canonical Ubuntu Linux.