Bug 2387840

Summary:	CVE-2025-55159 uv: Slab: Out-of-bounds Memory Access Vulnerability [fedora-42]
Product:	[Fedora] Fedora	Reporter:	Avinash Hanwate <ahanwate>
Component:	uv	Assignee:	Ben Beasley <code>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	42	CC:	code, mhroncok, python-packagers-sig, rust-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["d0780d21-3759-4f43-aa32-d81058a5de6b"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-08-13 14:30:54 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2387215
Bug Blocks:	2387745

Description Avinash Hanwate 2025-08-12 14:34:46 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.

The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams

Comment 1 Ben Beasley 2025-08-12 17:15:30 UTC

This can be resolved by rebuilding uv with rust-slab 0.4.11 or later, bug 2387215, https://github.com/advisories/GHSA-qx2v-8332-m4fv.

Comment 2 Ben Beasley 2025-08-13 14:30:54 UTC

Fabio Valentini has analyzed the packages that depend on rust-slab in Fedora and determined that nothing actually uses the affected API, Slab::get_disjoint_mut. The rust-slab package will still be updated, since something might start using the API in the future, but we don’t need to rebuild packages like uv specifically for this issue.