CVE-2009-4895

low-risk

Published 2010-09-08

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.

Do I need to act?

0.06% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.7/10 Medium

LOCAL / HIGH complexity

Affected Products (8)

Linux Kernel

Ubuntu Linux

Debian Linux

Ubuntu Linux

Affected Vendors

Debian Linux Canonical

References (20)

Broken Link http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=...

Third Party Advisory http://www.debian.org/security/2010/dsa-2094

Broken Link http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.6

Mailing List http://www.openwall.com/lists/oss-security/2010/06/15/2

Mailing List http://www.openwall.com/lists/oss-security/2010/06/15/3

Mailing List http://www.openwall.com/lists/oss-security/2010/06/15/4

Mailing List http://www.openwall.com/lists/oss-security/2010/06/15/5

Third Party Advisory http://www.ubuntu.com/usn/USN-1000-1

Issue Tracking https://bugzilla.kernel.org/show_bug.cgi?id=14605

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=559100