🛡️ GHSA-vgmh-mqm4-8j88 — pared

⚪ Unknown ✅ No Known Exploit CWE-416 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

pared Vulnerable to Use After Free in Parc and Prc Due to Missing Lifetime Constraints

Affected versions of this crate didn't provide sufficient lifetime constraints to conversion functions from alloc::sync::Arc and alloc::rc::Rc, which made it possible to create projections of these reference counted pointers. Unlike the original reference counted pointers, these projections could outlive original data's lifetimes.

This projected pointer could cause the original Arc's or Rc's Drop::drop to get called at a point where the original data was no longer valid, leading to a potential use after free.

The affected functions were

  • pared::prc::Prc::from_rc
  • pared::prc::Prc::project
  • pared::prc::Prc::try_from_rc
  • pared::sync::Parc::from_arc
  • pared::sync::Parc::project
  • pared::sync::Parc::try_from_arc

This flaw was fixed in [108f540ea8acb6073751a1aa386085c1cdc4fd1e](https://github.com/radekvit/pared/commit/108f540ea8acb6073751a1aa386085c1cdc4fd1e) by requiring that the type stored in the Arcs and Rcs passed to these functions contain T: 'static.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity high, availability high.

Weakness class

GHSA-vgmh-mqm4-8j88 is classified as CWE-416: Use After Free. Memory is used after being released, so its contents may already belong to something else.

Affected software

GHSA-vgmh-mqm4-8j88 is recorded against 1 package.

  • pared

Timeline and source

Published on 24 March 2025 and last revised on 28 October 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
github.com (Web)
github.com (Package)
rustsec.org (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
CWE CWE-416
Public Exploit ✅ No
Source OSV
Published 2025-03-24
Updated 2026-08-20
Modified 2025-10-28
Fix URL N/A

Affected Packages

Software From version Fixed in
pared — —

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