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EUVD-2026-70657

fkie_cve-2018-20991

An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free.

GHSA-rxr4-x558-x7hw — Double free in smallvec

Affected: crates.io: smallvec

If an iterator passed to SmallVec::insert_many panicked in Iterator::next, destructors were run during unwinding while the vector was in an inconsistent state, possibly causing a double free (a destructor running on two copies of the same value).

This is fixed in smallvec 0.6.3 by ensuring that the vector's length is not updated to include moved items until they have been removed from their original positions. Items may now be leaked if Iterator::next panics, but they will not be dropped more than once.

gsd-2018-20991

RUSTSEC-2018-0003 — Possible double free during unwinding in SmallVec::insert_many

Affected: crates.io: smallvec

If an iterator passed to `SmallVec::insert_many` panicked in `Iterator::next`, destructors were run during unwinding while the vector was in an inconsistent state, possibly causing a double free (a destructor running on two copies of the same value).

This is fixed in smallvec 0.6.3 by ensuring that the vector's length is not updated to include moved items until they have been removed from their original positions. Items may now be leaked if `Iterator::next` panics, but they will not be dropped more than once.

Thank you to [@Vurich](https://github.com/Vurich) for reporting this bug.

SUSE-SU-2021:1310-1 — Security update for librsvg

Security update for librsvg

UBUNTU-CVE-2018-20991

Affected: Ubuntu:20.04:LTS: rust-smallvec, Ubuntu:22.04:LTS: rust-smallvec, Ubuntu:24.04:LTS: rust-smallvec, Ubuntu:25.10: rust-smallvec, Ubuntu:26.04:LTS: rust-smallvec

An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free.