CVE-2024-26973 fat: fix uninitialized field in nostale filehandles
A local attacker can read uninitialized kernel memory via FAT filesystem file handles, potentially exposing sensitive data.
- 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-2024-26973?
CVE-2024-26973 is a medium-severity vulnerability in Debian Debian Linux, published on 1 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
fat: fix uninitialized field in nostale filehandles
When fat_encode_fh_nostale() encodes file handle without a parent it stores only first 10 bytes of the file handle. However the length of the file handle must be a multiple of 4 so the file handle is actually 12 bytes long and the last two bytes remain uninitialized. This is not great at we potentially leak uninitialized information with the handle to userspace. Properly initialize the full handle length.
Weakness: CWE-908
Which versions are affected by CVE-2024-26973?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2024-26973?
Apply the vendor's patch.
Is CVE-2024-26973 being exploited?
There is no known exploitation of CVE-2024-26973 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-40458, BELL-CVE-2024-26973, DEBIAN-CVE-2024-26973, GHSA-rq88-rprp-wpfq, UBUNTU-CVE-2024-26973.