7.8

CVE-2020-35906: rust-lang futures-task Use After Free

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2020-35906GHSA-r93v-9p5q-vhpfRUSTSEC-2020-0060
Published 31-12-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-35906 is a high (CVSS 7.8) Use After Free vulnerability in rust-lang futures-task. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.50%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 31-12-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in the futures-task crate before 0.3.6 for Rust. futures_task::waker may cause a use-after-free in a non-static type situation.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

+0.01 pp

From 0.49% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (rustsec.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Crates.Io1 product
  • futures-task≥ 0.2.1, < 0.3.6 | ≥ 0.2.2-0, < 0.3.6
Rust-lang1 product
Ubuntu1 product
  • rust-futures-taskAll versions (No fix recorded)

3 vendors · 3 products

References

7 links