libcurl UAF via curl_easy_pause() in SOCKETFUNCTION
CVE-2026-9080 Published on July 3, 2026

UAF after pause in socket callback
Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers a use-after-free vulnerability, where libcurl attempts to store a flag using a dangling struct pointer immediately after that pointer's memory has been freed.

NVD

Vulnerability Analysis

CVE-2026-9080 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to be low. considered to have a small impact on confidentiality and integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
LOW

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2026-9080 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2026-9080

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Canonical Ubuntu Linux
 
Haxx Curl
 

Affected Versions

curl: curl: curl: