Use-after-free in Linux kernel - CVE-2009-4141

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Main Vulnerability Database Vulnerabilities #VU91078

Use-after-free in Linux kernel - CVE-2009-4141

Published: June 4, 2024


Vulnerability identifier: #VU91078
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2009-4141
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the fasync_helper() function in fs/fcntl.c. A local user can execute arbitrary code with elevated privileges.


Affected software

Linux kernel
Ubuntu
linux-source-2.6.15 (Ubuntu package)
linux (Ubuntu package)

How to mitigate CVE-2009-4141

Install update from vendor's website.

Linux kernel - update to 2.6.33 rc4
linux-source-2.6.15 (Ubuntu package) - update to 2.6.15-55.82
linux (Ubuntu package) - addressed in versions 2.6.24-27.65, 2.6.27-17.45, 2.6.28-18.59, 2.6.31-19.56

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins