CVE-2007-3731 Null dereference in n/a
Local attackers can cause a kernel denial of service via NULL dereference by exploiting improper handling of invalid LDT segment selectors during ptrace 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-2007-3731?
CVE-2007-3731 is a medium-severity vulnerability in Linux kernel, published on 17 Sep 2007. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function.
Weakness: CWE-20
Which versions are affected by CVE-2007-3731?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2007-3731?
Apply the vendor's patch.
Is CVE-2007-3731 being exploited?
There is no known exploitation of CVE-2007-3731 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-frx9-99ch-7q7j.