What’s Vulnerable › Vulnerabilities

CVE-2020-35907: futures_task::noop_waker_ref can segfault due to dereferencing a NULL pointer

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-31 · updated 2026-06-17
• Weakness: CWE-476

Description

An issue was discovered in the futures-task crate before 0.3.5 for Rust. futures_task::noop_waker_ref allows a NULL pointer dereference.

Affected products

• rust-lang Futures-Task: before 0.3.5 — fixed in 0.3.5
• Crates.Io Futures-Task: before 0.3.5 — fixed in 0.3.5

How to fix

Upgrade to a fixed version: rust-lang Futures-Task 0.3.5; Crates.Io Futures-Task 0.3.5. Check the vendor advisory for mitigations.

References

• https://rustsec.org/advisories/RUSTSEC-2020-0061.html
• https://rustsec.org/advisories/RUSTSEC-2020-0061.html

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