Bug 2507893 - CVE-2026-10536 rustup: libcurl: Use-after-free vulnerability leading to Denial of Service [fedora-all]
Summary: CVE-2026-10536 rustup: libcurl: Use-after-free vulnerability leading to Denia...
Keywords:
Status: CLOSED CANTFIX
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": ["4d7b0ee2-22af-4746-a28b-1...
Depends On:
Blocks: CVE-INVALID CVE-2026-10536
TreeView+ depends on / blocked
 
Reported: 2026-07-28 07:20 UTC by Srikanth Balasubramanian
Modified: 2026-07-28 10:44 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-07-28 10:44:36 UTC
Type: ---
Embargoed:


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Description Srikanth Balasubramanian 2026-07-28 07:20:49 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.

A use-after-free vulnerability exists in libcurl when an application
configures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or
`CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and
finally terminates the handle with `curl_easy_cleanup()`. During this final
cleanup phase, libcurl attempts to access and modify an internal structure
that was already freed during the reset operation.

Comment 1 Fabio Valentini 2026-07-28 10:44:36 UTC
rustup only dynamically links to libcurl, so this issue needs to be addressed in the curl package itself.


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