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No exploitation reportedFix available

CVE-2020-35861

No exploitation reported by the sources we read.

  • Published2020-12-31
  • Fixed in3.2.1
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in the bumpalo crate before 3.2.1 for Rust. The realloc feature allows the reading of unknown memory. Attackers can potentially read cryptographic keys.

Timeline

dates in UTC
  1. 2020-12-3110:15CVE publishedNVD

Versions per branch

NVD · OSV
Bumpalo project bumpalo
BranchAffectedFixed in
3.x≥ 3.0.0, < 3.2.13.2.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • rust-bumpaloUbuntu:20.04:LTSall versions · no fixed version listed
  • rust-bumpaloDebian:14all versions · fixed in 3.2.1-1
  • rust-bumpaloDebian:13all versions · fixed in 3.2.1-1
  • rust-bumpaloDebian:12all versions · fixed in 3.2.1-1

Full record on NVD

Fix

  1. Update Bumpalo project bumpalo to 3.2.1

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2020-12-31
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-vqx7-pw4r-29rr

Frequently asked questions

What is CVE-2020-35861?

An issue was discovered in the bumpalo crate before 3.2.1 for Rust. The realloc feature allows the reading of unknown memory. Attackers can potentially read cryptographic keys.

Is CVE-2020-35861 actively exploited?

Active exploitation of CVE-2020-35861 has not been confirmed. Its EPSS score was 1.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-35861?

CVE-2020-35861 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record