CVE-2010-0309

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2010-02-12 · updated 2026-06-16
Weakness: CWE-16

Description

The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.

Affected products

Linux Kernel: all versions

References

http://secunia.com/advisories/38492
http://secunia.com/advisories/38922
http://www.debian.org/security/2010/dsa-1996
http://www.mail-archive.com/kvm%40vger.kernel.org/msg28002.html
http://www.openwall.com/lists/oss-security/2010/02/02/1
http://www.openwall.com/lists/oss-security/2010/02/02/4
http://www.securityfocus.com/bid/38158
http://www.ubuntu.com/usn/USN-914-1
http://www.vupen.com/english/advisories/2010/0638
https://bugzilla.redhat.com/show_bug.cgi?id=560887
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11095
https://rhn.redhat.com/errata/RHSA-2010-0088.html

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