CVE-2009-4141

Linux kernel <2.6.33-rc4 - Privilege Escalation

Title source: llm

Description

Use-after-free vulnerability in the fasync_helper function in fs/fcntl.c in the Linux kernel before 2.6.33-rc4-git1 allows local users to gain privileges via vectors that include enabling O_ASYNC (aka FASYNC or FIOASYNC) on a locked file, and then closing this file.

Exploits (1)

exploitdb WORKING POC VERIFIED

by Tavis Ormandy · clocallinux

https://www.exploit-db.com/exploits/33523

View Code ZIP pw:eip

References (16)

[Exploit] http://archives.neohapsis.com/archives/fulldisclosure/2010-01/0252.html

[Patch] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53281b6d34d44308372d16acb7fb5327609f68b6

[Mailing List] http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00002.html

[Exploit] http://lock.cmpxchg8b.com/5ebe2294ecd0e0f08eab7690d2a6ee69/create_elf_tables.c

[Vendor Advisory] http://secunia.com/advisories/38199

[Vendor Advisory] http://support.avaya.com/css/P8/documents/100073666

[Patch] http://twitter.com/taviso/statuses/7744108017

[Patch] http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.33-rc4-git1.bz2

[Vendor Advisory] http://www.redhat.com/support/errata/RHSA-2010-0161.html

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/37806

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=547906

[Third Party Advisory, VDB Entry] https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7054

[Third Party Advisory, VDB Entry] https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9201

[Vendor Advisory] https://rhn.redhat.com/errata/RHSA-2010-0046.html

[Vendor Advisory] https://rhn.redhat.com/errata/RHSA-2010-0095.html

[Third Party Advisory] http://secunia.com/advisories/39033

Scores

EPSS 0.0011

EPSS Percentile 28.9%

Details

CWE

CWE-399

Status published

Products (50)

linux/linux_kernel 2.6.0

linux/linux_kernel 2.6.1

linux/linux_kernel 2.6.2

linux/linux_kernel 2.6.3

linux/linux_kernel 2.6.4

linux/linux_kernel 2.6.5

linux/linux_kernel 2.6.6

linux/linux_kernel 2.6.7

linux/linux_kernel 2.6.8

linux/linux_kernel 2.6.8.1

... and 40 more

Published Jan 19, 2010

Tracked Since Feb 18, 2026