use-after-free vulnerability in Rust array-queue

published 2020-09-26 6y ago modified 2026-06-17 4mo ago also GHSA-75cq-g75g-rxff , RUSTSEC-2020-0047 , EUVD-2021-1609

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

An issue was discovered in the array-queue crate through 2020-09-26 for Rust. A pop_back() call may lead to a use-after-free.

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Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

rustsec.org https://rustsec.org/advisories/RUSTSEC-2020-0047.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N
GitHub	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
OSV	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
crates.io	array-queue	>=0.3.0, <=0.3.3 >=0.3.0	no fix listed

Classification

Weakness

CWE-416 Use After Free

References

rustsec.org /advisories/RUSTSEC-2020-0047.html
web, exploit, third-party-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2020-35900
advisory
github.com /raviqqe/array-queue/issues/2
web, report
github.com /raviqqe/array-queue
package
crates.io /crates/array-queue
package

Sources

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.