Slackware 12.2 / current : kernel (SSA:2009-230-01)

high Nessus Plugin ID 40622


The remote Slackware host is missing a security update.


New Linux kernel packages are available for Slackware 12.2 and
-current to address a security issue. A kernel bug discovered by Tavis Ormandy and Julien Tinnes of the Google Security Team could allow a local user to fill memory page zero with arbitrary code and then use the kernel sendpage operation to trigger a NULL pointer dereference, executing the code in the context of the kernel. If successfully exploited, this bug can be used to gain root access. At this time we have prepared fixed kernels for the stable version of Slackware (12.2), as well as for both 32-bit x86 and x86_64 -current versions.
Additionally, we have added a package to the /patches directory for Slackware 12.1 and 12.2 that will set the minimum memory page that can be mmap()ed from userspace without additional privileges to 4096. The package will work with any kernel supporting the vm.mmap_min_addr tunable, and should significantly reduce the potential harm from this bug, as well as future similar bugs that might be found in the kernel.
More updated kernels may follow.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 40622

File Name: Slackware_SSA_2009-230-01.nasl

Version: 1.17

Type: local

Published: 8/20/2009

Updated: 1/14/2021

Supported Sensors: Nessus

Risk Information


Risk Factor: Critical

Score: 9.6


Risk Factor: High

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:slackware:slackware_linux:kernel-firmware, p-cpe:/a:slackware:slackware_linux:kernel-generic, p-cpe:/a:slackware:slackware_linux:kernel-generic-smp, p-cpe:/a:slackware:slackware_linux:kernel-headers, p-cpe:/a:slackware:slackware_linux:kernel-huge, p-cpe:/a:slackware:slackware_linux:kernel-huge-smp, p-cpe:/a:slackware:slackware_linux:kernel-modules, p-cpe:/a:slackware:slackware_linux:kernel-modules-smp, p-cpe:/a:slackware:slackware_linux:kernel-source, cpe:/o:slackware:slackware_linux, cpe:/o:slackware:slackware_linux:12.2

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/18/2009

Exploitable With


Core Impact

Metasploit (Linux Kernel Sendpage Local Privilege Escalation)

Reference Information

CVE: CVE-2009-2692

CWE: 119

SSA: 2009-230-01