From =?UTF-8?Q?Moritz_M=C3=BChlenhoff?=@21:1/5 to All on Wed Jul 16 11:30:02 2025
Package: pycares
X-Debbugs-CC: [email protected]
Severity: important
Tags: security
Hi,
The following vulnerability was published for pycares.
CVE-2025-48945[0]:
| pycares is a Python module which provides an interface to c-ares.
| c-ares is a C library that performs DNS requests and name
| resolutions asynchronously. Prior to version 4.9.0, pycares is
| vulnerable to a use-after-free condition that occurs when a Channel
| object is garbage collected while DNS queries are still pending.
| This results in a fatal Python error and interpreter crash. The
| vulnerability has been fixed in pycares 4.9.0 by implementing a safe
| channel destruction mechanism.