CVE-2006-5755

kernel: local denial of service due to NT bit leakage

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during a context switch, which allows local users to cause a denial of service (crash) by causing SYSENTER to set an NT flag, which can trigger a crash on the IRET of the next task.

El núcleo de Linux anterior a 2.6.18, cuando se ejecuta en sistemas x86_64, no guarda o restaura adecuadamente las EFLAGS durante un cambio de contexto, lo cual permite a usuarios locales provocar una denegación de servicio (caída) provocando que SYSENTER active una bandera NT, lo que dispara una caída en el IRET de la siguiente tarea.

Several local vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. This is an update to DSA-1381-1 which included only amd64 binaries for linux-2.6. Builds for all other architectures are now available, as well as rebuilds of ancillary packages that make use of the included linux source.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2006-11-06 CVE Reserved
2006-12-31 CVE Published
2024-08-07 CVE Updated
2025-03-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (18)

URL	Tag	Source
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9	X_refsource_confirm
http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9	X_refsource_confirm
http://secunia.com/advisories/24098	Third Party Advisory
http://secunia.com/advisories/25691	Third Party Advisory
http://secunia.com/advisories/26620	Third Party Advisory
http://secunia.com/advisories/26994	Third Party Advisory
http://secunia.com/advisories/32485	Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.18	X_refsource_confirm
http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.18-git13.log	X_refsource_confirm
http://www.securityfocus.com/archive/1/471457	Mailing List
http://www.securityfocus.com/bid/26060	Vdb Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9554	Signature

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.debian.org/security/2007/dsa-1381	2023-02-13
http://www.mandriva.com/security/advisories?name=MDKSA-2007:171	2023-02-13
http://www.redhat.com/support/errata/RHSA-2008-0957.html	2023-02-13
http://www.ubuntu.com/usn/usn-416-1	2023-02-13
https://access.redhat.com/security/cve/CVE-2006-5755	2008-11-04
https://bugzilla.redhat.com/show_bug.cgi?id=457718	2008-11-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 2.6.17 Search vendor "Linux" for product "Linux Kernel" and version " <= 2.6.17"		-		Affected