Bug 2553422 - CVE-2026-9080 rustup: libcurl: Use-after-free via curl_easy_pause() in CURLMOPT_SOCKETFUNCTION callback [fedora-all]
Summary: CVE-2026-9080 rustup: libcurl: Use-after-free via curl_easy_pause() in CURLMO...
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora
Classification: Fedora
Component: rustup
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Rust SIG
QA Contact:
URL:
Whiteboard: {"flaws": ["f1a852e9-030d-42ce-b03d-e...
Depends On:
Blocks: CVE-2026-9080
TreeView+ depends on / blocked
 
Reported: 2026-10-15 12:47 UTC by Avinash Hanwate
Modified: 2026-11-06 22:08 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-11-06 22:08:30 UTC
Type: ---
Embargoed:


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Description Avinash Hanwate 2026-10-15 12:47:25 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.

Comment 1 Josh Stone 2026-11-06 22:08:30 UTC
rustup is dynamically linked to the system libcurl -- there's nothing to fix on its own.


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