CVE-2009-1337

CVE-2009-1337 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Description

The exit_notify function in kernel/exit.c in the Linux kernel before 2.6.30-rc1 does not restrict exit signals when the CAP_KILL capability is held, which allows local users to send an arbitrary signal to a process by running a program that modifies the exit_signal field and then uses an exec system call to launch a setuid application.

Frequently asked questions

What is CVE-2009-1337?
The exit_notify function in kernel/exit.c in the Linux kernel before 2.6.30-rc1 does not restrict exit signals when the CAP_KILL capability is held, which allows local users to send an arbitrary signal to a process by running a program that modifies the exit_signal field and then uses an exec system call to launch a setuid application.
How severe is CVE-2009-1337?
CVE-2009-1337 has a CVSS 2.0 base score of 4.4, rated medium severity.
Is CVE-2009-1337 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1337?
CVE-2009-1337 primarily affects Linux Linux Kernel. In total, 342 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1337?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1337 published?
CVE-2009-1337 was published on 2009-04-22 and last updated on 2026-06-16.

References

Affected products (342)

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