CVE-2009-1243

Publication date 6 April 2009

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

Description

net/ipv4/udp.c in the Linux kernel before 2.6.29.1 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."

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 9.04 jaunty
Not affected
8.10 intrepid
Not affected
8.04 LTS hardy
Not affected
7.10 gutsy Not in release
6.06 LTS dapper Not in release
linux-source-2.6.15 9.04 jaunty Not in release
8.10 intrepid Not in release
8.04 LTS hardy Not in release
7.10 gutsy Not in release
6.06 LTS dapper
Not affected
linux-source-2.6.22 9.04 jaunty Not in release
8.10 intrepid Not in release
8.04 LTS hardy Not in release
7.10 gutsy Ignored end of life, was needs-triage
6.06 LTS dapper Not in release

Notes

smb

introducted with v2.6.29-rc1 and fixed in v2.6.30-rc1.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Other references