CVE-2018-20991 Double free in smallvec
A double free vulnerability in the smallvec Rust crate allows attackers to cause denial of service or potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-20991?
CVE-2018-20991 is a critical use after free vulnerability in n/a, published on 26 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free.
Weakness: CWE-415
Which versions are affected by CVE-2018-20991?
3 open source packages ship an affected version, including smallvec. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
smallvec crates.io | From 0.3.2 | 0.3.4, 0.4.5, 0.5.1, 0.6.3 |
smallvec crates.io | From 0.3.2 | 0.6.3 |
smallvec crates.io | From 0.3.2 | 0.6.3 |
Linux distribution packages (1)
librsvg SUSE:Linux Enterprise Module for Package Hub 15 SP2 | All versions | 2.42.9-3.6.1 |
Products include Servo Smallvec.
How do I fix CVE-2018-20991?
Upgrade smallvec to a fixed version for your release line: 0.3.4, 0.4.5, 0.5.1 or 0.6.3.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2018-20991 being exploited?
There is no known exploitation of CVE-2018-20991 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-rxr4-x558-x7hw, RUSTSEC-2018-0003, SUSE-SU-2021:1310-1, UBUNTU-CVE-2018-20991.