CVE-2025-48945

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Source
https://cve.org/CVERecord?id=CVE-2025-48945
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-48945.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-48945
Aliases
Downstream
AZL (2)
DEBIAN (1)
OESA (5)
openSUSE (1)
SUSE (1)
UBUNTU (1)
Related
Published
2025-06-20T19:14:27Z
Modified
2026-10-21T02:53:51Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
pycares has a Use-After-Free Vulnerability
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-416"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48945.json"
}
References

Affected packages

Git / github.com/aio-libs/aiodns

Affected ranges

Type
GIT
Repo
https://github.com/aio-libs/aiodns
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f259a6e3650555157af53ac2b39f2ff545321d55
Fixed
83533f4d17dd769a5bc0fce6e4c7610b6abde85e
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "fixed":  "f259a6e3650555157af53ac2b39f2ff545321d55"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v3.5.0",
            "range":  [
                {
                    "fixed":  "83533f4d17dd769a5bc0fce6e4c7610b6abde85e"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}
Type
GIT
Repo
https://github.com/saghul/pycares
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4c761b47fd5116d5bb5cf46c509e07d8a9d0f99a
Fixed
ebfd7d71eb8e74bc1057a361ea79a5906db510d4
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "4.9.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "ebfd7d71eb8e74bc1057a361ea79a5906db510d4"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v4.9.0",
            "range":  [
                {
                    "fixed":  "4c761b47fd5116d5bb5cf46c509e07d8a9d0f99a"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

aiodns-0.*
aiodns-0.1.0
aiodns-0.2.0
aiodns-0.3.0
aiodns-0.3.1
aiodns-0.3.2
aiodns-1.*
aiodns-1.0.0
aiodns-1.0.1
aiodns-1.1.1
aiodns-1.2.0
aiodns-2.*
aiodns-2.0.0
aiodns-2.0.0b0
aiodns-2.0.0b1
aiodns-2.0.0b2
aiodns-3.*
aiodns-3.0.0
pycares-0.*
pycares-0.6.0
pycares-0.6.1
pycares-0.6.2
pycares-0.6.3
pycares-0.7.0
pycares-1.*
pycares-1.0.0
pycares-2.*
pycares-2.0.0
pycares-2.0.1
pycares-2.1.0
pycares-2.1.1
pycares-2.2.0
pycares-2.3.0
pycares-2.4.0
pycares-3.*
pycares-3.0.0
pycares-3.0.0b0
pycares-3.0.0b1
pycares-3.0.0b2
pycares-3.0.0b3
pycares-3.0.0b4
pycares-3.0.0b5
pycares-3.1.0
pycares-3.1.0-fix1
pycares-3.1.0-fix2
pycares-3.1.0-fix3
pycares-3.1.1
pycares-3.2.0
pycares-3.2.1
pycares-3.2.2
pycares-3.2.3
pycares-4.*
pycares-4.0.0
pycares-4.1.0
pycares-4.1.1
pycares-4.1.2
pycares-4.2.0
pycares-4.2.1
pycares-4.2.2
pycares-4.3.0
release-0.*
release-0.1.0
release-0.2.0
release-0.3.0
release-0.4.0
release-0.5.0
v3.*
v3.1.0
v3.1.1
v3.2.0
v3.3.0
v3.4.0
v4.*
v4.4.0
v4.5.0
v4.6.0
v4.6.1
v4.7.0
v4.8.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-48945.json"