CVE-2006-5173

Linux Kernel 2.4.0-2.6.19 - Denial of Service via EFLAGS Context Switch Mismanagement

Title source: llm
STIX 2.1

Description

Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access.

References (11)

Core 11
Core References
Broken Link vendor-advisory x_refsource_suse
http://www.novell.com/linux/security/advisories/2006_79_kernel.html
Broken Link third-party-advisory x_refsource_secunia
http://secunia.com/advisories/23361
Broken Link third-party-advisory x_refsource_secunia
http://secunia.com/advisories/23593
Broken Link third-party-advisory x_refsource_secunia
http://secunia.com/advisories/23384
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/21851
Broken Link third-party-advisory x_refsource_secunia
http://secunia.com/advisories/23474
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/471457
Broken Link vendor-advisory x_refsource_mandriva
http://www.mandriva.com/security/advisories?name=MDKSA-2007:002
Third Party Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/usn-395-1
Broken Link third-party-advisory x_refsource_secunia
http://secunia.com/advisories/25691

Scores

EPSS 0.0042
EPSS Percentile 34.6%

Details

Status published
Products (4)
canonical/ubuntu_linux 5.10
canonical/ubuntu_linux 6.06
canonical/ubuntu_linux 6.10
linux/linux_kernel 2.4.0 - 2.6.19
Published Oct 17, 2006
Tracked Since Feb 18, 2026