CVE-2009-3043 Null dereference in n/a

What is CVE-2009-3043?

CVE-2009-3043 is a medium-severity vulnerability in Linux kernel, published on 2 Sep 2009. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-399

Which versions are affected by CVE-2009-3043?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2009-3043?

No fix has been published for CVE-2009-3043 yet. Limit exposure of the affected software until one is available.

Is CVE-2009-3043 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-3043 exists.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-j6rr-99wm-q9wm.