HOMEVULNERABILITIESCVE-2020-35906
HIGH

CVE-2020-35906

CWE-416Published: December 31, 2020· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-35906 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

rust-lang1 product(s)
futures-task
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://rustsec.org/advisories/RUSTSEC-2020-0060.html
PATCHhttps://rustsec.org/advisories/RUSTSEC-2020-0060.html

All References (2)

→
https://rustsec.org/advisories/RUSTSEC-2020-0060.htmlExploit · Patch · Third Party Advisory
→
https://rustsec.org/advisories/RUSTSEC-2020-0060.htmlExploit · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-35906
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-416
CISA KEVNo
Affected1 vendor(s)
PublishedDec 31, 2020

Related CVEs (CWE-416)

CVE-2012-1974
10.0
CVE-2012-1976
10.0
CVE-2012-1972
10.0
CVE-2012-1973
10.0
CVE-2012-1975
10.0
CVE-2012-3956
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-35906 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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