CVE-2009-3624 Use after free in n/a
Local attackers can exploit a reference counting error in the Linux kernel keyring subsystem to escalate privileges or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2009-3624?
CVE-2009-3624 is a medium-severity use after free vulnerability in Linux kernel, published on 2 Nov 2009. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The get_instantiation_keyring function in security/keys/keyctl.c in the KEYS subsystem in the Linux kernel before 2.6.32-rc5 does not properly maintain the reference count of a keyring, which allows local users to gain privileges or cause a denial of service (OOPS) via vectors involving calls to this function without specifying a keyring by ID, as demonstrated by a series of keyctl request2 and keyctl list commands.
Weakness: CWE-310
Which versions are affected by CVE-2009-3624?
It affects 2 products.
Products include Linux Kernel, Linux kernel.
How do I fix CVE-2009-3624?
No fix has been published for CVE-2009-3624 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2009-3624 being exploited?
There is no known exploitation of CVE-2009-3624 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-gx7p-6h8g-757g.