CVE-2018-20991 json
Double free in smallvec
published 8y ago modified 3mo ago also GHSA-rxr4-x558-x7hw , RUSTSEC-2018-0003 , EUVD-2021-1878
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free.
Patch / fix
- crates.io smallvec 0.3.4, 0.4.5, 0.5.1, 0.6.3
- servo smallvec 0.6.3
- librsvg SLE Module for Package Hub 15 SP2 2.42.9-3.6.1
suse advisories SUSE-SU-2021:1310-1
Is CVE-2018-20991 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.85% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | smallvec | >=0.3.2, <0.6.3 >=0.3.2, <0.3.4 >=0.4.0-0, <0.4.5 >=0.5.0-0, <0.5.1 >=0.6.0-0, <0.6.3 |
0.6.3 0.3.4 0.4.5 0.5.1 |
Classification
- Weakness
-
- CWE-415 Double Free
References
-
rustsec.org
/advisories/RUSTSEC-2018-0003.html
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-20991
advisory
-
github.com
/servo/rust-smallvec/issues/96
web, report
-
github.com
/servo/rust-smallvec
package
-
crates.io
/crates/smallvec
package
Sources
- CVE List CVE-2018-20991
- GitHub Advisory GHSA-rxr4-x558-x7hw
- NVD CVE-2018-20991
- OSV RUSTSEC-2018-0003
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.