trailer mishandles allocating with a size of zero

published 2025-05-04 18 mo ago modified 2026-06-17 4 mo ago also GHSA-6x45-r4pr-5362 , RUSTSEC-2025-0163 , EUVD-2025-14091

cvss: 2.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

lib.rs in the trailer crate through 0.1.2 for Rust mishandles allocating with a size of zero.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-05-09)

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/Geal/trailer/issues/2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	2.9	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV	3.1	2.9	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub	3.1	2.9	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
crates.io	trailer	<=0.1.2 >=0.0.0-0	no fix listed

Affected products

Geal trailer

Classification

Weakness

CWE-762 Mismatched Memory Management Routines

References

github.com /Geal/trailer/issues/2
exploit, web, issue-tracking, report
crates.io /crates/trailer
web, product, package
nvd.nist.gov /vuln/detail/CVE-2025-47737
advisory
github.com /Geal/trailer
package
rustsec.org /advisories/RUSTSEC-2025-0163.html
web, advisory

Sources

Fencer Vulns 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.

Summary