VDB
CVE-2025-48945
CVE-2025-48945
PUBLISHED
CVSS 8.199999809265137 HIGH
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.
EPSS 0.43% · 35.5th percentile
Risk Scores
CVSS 4.0
8.199999809265137
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.43%
35.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| aio-libs | aiodns | < 4.9.0 |
Timeline
- Jan 21, 1970 Security Advisory
- Jun 16, 2025 CVE Published
- Jun 20, 2025 Coalition ESS Score
- Jun 20, 2025 PoC Published
- Jun 21, 2025 EPSS Score
- Jun 23, 2025 Coalition ESS Score
- Jun 23, 2025 PoC Published
- Jul 1, 2025 EPSS Score
- Jul 12, 2025 EPSS Score
- Jul 22, 2025 EPSS Score
- Aug 1, 2025 EPSS Score
- Aug 11, 2025 EPSS Score
References
- https://github.com/saghul/pycares/security/advisories/GHSA-5qpg-rh4j-qp35 url
- https://github.com/aio-libs/aiodns/commit/f259a6e3650555157af53ac2b39f2ff545321d55 url
- https://github.com/saghul/pycares/commit/ebfd7d71eb8e74bc1057a361ea79a5906db510d4 url
- https://github.com/aio-libs/aiodns/releases/tag/v3.5.0 url
- https://github.com/saghul/pycares/releases/tag/v4.9.0 url