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Fencer Intel
critical 9.8

CVE-2020-35881 json

Out of bounds write in traitobject

published 6y ago modified last mo. also GHSA-j79j-cx3h-g27h , RUSTSEC-2020-0027 , EUVD-2021-1769

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

An issue was discovered in the traitobject crate through 2020-06-01 for Rust. It has false expectations about fat pointers, possibly causing memory corruption in, for example, Rust 2.x.

Patch / fix

  • aws-efs-utils SLE Module for Public Cloud 15 SP7, SLE Module for Public Cloud 15 SP6, openSUSE Leap 15.6 2.3.3-150600.17.6.1

suse advisories SUSE-SU-2025:3954-1

  • aws-efs-utils openSUSE Tumbleweed 2.2.1-1.1

opensuse advisories openSUSE-SU-2025:14951-1

Is CVE-2020-35881 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.

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Exploit prediction

1.73% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • rustsec.org https://rustsec.org/advisories/RUSTSEC-2020-0027.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/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 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/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 traitobject
<=0.1.0
>=0.0.0-0
 no fix listed

Classification

Weakness

References

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.