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EUVD-2026-24927

fkie_cve-2021-25900

An issue was discovered in the smallvec crate before 0.6.14 and 1.x before 1.6.1 for Rust. There is a heap-based buffer overflow in SmallVec::insert_many.

GHSA-43w2-9j62-hq99 — Buffer overflow in SmallVec::insert_many

Affected: crates.io: smallvec

A bug in the SmallVec::insert_many method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap. This bug was only triggered if the iterator passed to insert_many yielded more items than the lower bound returned from its size_hint method.

The flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of insert_many to use less unsafe code, so it is easier to verify its correctness.

gsd-2021-25900

openSUSE-SU-2021:0634-1 — Security update for librsvg

Security update for librsvg

RUSTSEC-2021-0003 — Buffer overflow in SmallVec::insert_many

Affected: crates.io: smallvec

A bug in the `SmallVec::insert_many` method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap.

This bug was only triggered if the iterator passed to `insert_many` yielded more items than the lower bound returned from its `size_hint` method. The flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of `insert_many` to use less unsafe code, so it is easier to verify its correctness.

Thank you to Yechan Bae ([@Qwaz](https://github.com/Qwaz)) and the Rust group at Georgia Tech’s SSLab for finding and reporting this bug.

SUSE-SU-2021:1408-1 — Security update for librsvg

Security update for librsvg

UBUNTU-CVE-2021-25900

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 0.6.14 and 1.x before 1.6.1 for Rust. There is a heap-based buffer overflow in SmallVec::insert_many.