Is CVE-2009-4895 being actively exploited?

CVE-2009-4895 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-4895?

CVE-2009-4895 has a CVSS 3.1 base score of 4.7 (MEDIUM).

CVE-2009-4895

MEDIUM · CVSS 4.7EPSS 0.3%EU EUVD

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.

Key facts

CVSS score: 4.7 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-362
EPSS score: 0.3% (18th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-4858)
Published: September 8, 2010
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-4858 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
linux / linux kernel

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=703625118069f9f8960d356676662d3db5a9d116(Broken Link)
http://www.debian.org/security/2010/dsa-2094(Third Party Advisory)
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.6(Broken Link)
http://www.openwall.com/lists/oss-security/2010/06/15/2(Mailing List, Patch, Third Party Advisory)
http://www.openwall.com/lists/oss-security/2010/06/15/3(Mailing List, Third Party Advisory)
http://www.openwall.com/lists/oss-security/2010/06/15/4(Mailing List, Third Party Advisory)
http://www.openwall.com/lists/oss-security/2010/06/15/5(Mailing List, Third Party Advisory)
http://www.ubuntu.com/usn/USN-1000-1(Third Party Advisory)
https://bugzilla.kernel.org/show_bug.cgi?id=14605(Issue Tracking, Patch)
https://bugzilla.redhat.com/show_bug.cgi?id=559100(Issue Tracking, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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