CVE-2009-3043

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-09-02 · updated 2026-06-16
Weakness: CWE-399

Description

The tty_ldisc_hangup function in drivers/char/tty_ldisc.c in the Linux kernel 2.6.31-rc before 2.6.31-rc8 allows local users to cause a denial of service (system crash, sometimes preceded by a NULL pointer dereference) or possibly gain privileges via certain pseudo-terminal I/O activity, as demonstrated by KernelTtyTest.c.

Affected products

Linux kernel: through 2.6.31; 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.6.5 (+309)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5c58ceff103d8a654f24769bb1baaf84a841b0cc
http://lkml.org/lkml/2009/8/20/21
http://lkml.org/lkml/2009/8/20/27
http://lkml.org/lkml/2009/8/20/68
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc8
http://www.openwall.com/lists/oss-security/2009/08/31/1
http://www.openwall.com/lists/oss-security/2009/09/03/6
http://www.openwall.com/lists/oss-security/2009/09/03/7
http://www.securityfocus.com/bid/36191
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5c58ceff103d8a654f24769bb1baaf84a841b0cc
http://lkml.org/lkml/2009/8/20/21
http://lkml.org/lkml/2009/8/20/27

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