pycares: pycares is a Python module which provides an interface to c-ares
CVE-2025-48945 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2025-48945, released June 20, 2025. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pycares · Debian 14 | 4.9.0-1 | DEBIAN-CVE-2025-48945 | Jun 20, 2025 |
| python-pycares · opensuse-leap 15.6 | 4.10.0-150400.9.8.1 | SUSE-SU-2025:03354-1 | Sep 25, 2025 |
| python-pycares · sles 15.6 | 4.10.0-150400.9.8.1 | SUSE-SU-2025:03354-1 | Sep 25, 2025 |
| python-pycares · sles 15.7 | 4.10.0-150400.9.8.1 | SUSE-SU-2025:03354-1 | Sep 25, 2025 |
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