CVE-2023-30571 Race condition in n/a
A race condition in Libarchive can set directory permissions to world-writable, allowing local users to modify or delete files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-30571?
CVE-2023-30571 is a low-severity vulnerability in Libarchive Libarchive, published on 29 May 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-privileged local user can delete and rename files inside those directories.
Weakness: CWE-362
Which versions are affected by CVE-2023-30571?
It affects 1 product.
Products include Libarchive Libarchive.
How do I fix CVE-2023-30571?
Apply the vendor's patch.
Is CVE-2023-30571 being exploited?
There is no known exploitation of CVE-2023-30571 in the wild and no public exploit code.
Other vulnerabilities in Libarchive Libarchive
Sources
Also known as DEBIAN-CVE-2023-30571, GHSA-cw7x-3mv7-w6xm, JLSEC-2025-238, UBUNTU-CVE-2023-30571.