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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | linux-2.6 | 2.6.26-24lenny1 | DSA-2094-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | kernel-rt +9 | 2.6.24.7-149.el5rt | RHSA-2010:0161 |
Advisories 2
- RHSA-2010:0161 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2094-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20100615 Re: CVE Request - kernel: put_tty_queue NULL pointer deref mailing-list
- USN-1000-1 vendor-advisory
- https://bugzilla.kernel.org/show_bug.cgi?id=14605
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.6
- [oss-security] 20100615 CVE Request - kernel: put_tty_queue NULL pointer deref mailing-list
- [oss-security] 20100615 Re: CVE Request - kernel: put_tty_queue NULL pointer deref mailing-list
- [oss-security] 20100615 Re: CVE Request - kernel: put_tty_queue NULL pointer deref mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=703625118069f9f8960d356676662d3db5a9d116
- https://bugzilla.redhat.com/show_bug.cgi?id=559100
- DSA-2094 vendor-advisory