CVE-2009-0745 Denial of service in n/a
Local attackers can cause a kernel denial of service via crafted memory values during ext4 resize operations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-0745?
CVE-2009-0745 is a medium-severity denial of service vulnerability in Linux kernel, published on 27 Feb 2009. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The ext4_group_add function in fs/ext4/resize.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not properly initialize the group descriptor during a resize (aka resize2fs) operation, which might allow local users to cause a denial of service (OOPS) by arranging for crafted values to be present in available memory.
Weakness: CWE-20
Which versions are affected by CVE-2009-0745?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2009-0745?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2009-0745 being exploited?
There is no known exploitation of CVE-2009-0745 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-pmh2-h42j-q27q.