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Vulnerability Details : CVE-2009-1243

net/ipv4/udp.c in the Linux kernel before performs an unlocking step in certain incorrect circumstances, which allows local users to cause a denial of service (panic) by reading zero bytes from the /proc/net/udp file and unspecified other files, related to the "udp seq_file infrastructure."
Publish Date : 2009-04-06 Last Update Date : 2020-08-25
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service

- Vendor Statements

Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, 5 or Red Hat Enterprise MRG.
Source: Redhat

- Products Affected By CVE-2009-1243

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2009-1243
XF linux-kernel-procnetudp-dos(49595)
VUPEN ADV-2009-0924
MLIST [oss-security] 20090401 CVE request: kernel: udp: Wrong locking code in udp seq_file infrastructure;a=commit;h=30842f2989aacfaba3ccb39829b3417be9313dbe CONFIRM
BID 34329 Linux Kernel '/proc/net/udp' Local Denial of Service Vulnerability Release Date:2009-04-01 CONFIRM

- Metasploit Modules Related To CVE-2009-1243

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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