What’s Vulnerable › Vulnerabilities

CVE-2026-35369: uutils coreutils kill System-wide Process Termination and Denial of Service via Argument Misinterpretation

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-22 · updated 2026-10-25
• Weakness: CWE-20

Description

An argument parsing error in the kill utility of uutils coreutils incorrectly interprets kill -1 as a request to send the default signal (SIGTERM) to PID -1. Sending a signal to PID -1 causes the kernel to terminate all processes visible to the caller, potentially leading to a system crash or massive process termination. This differs from GNU coreutils, which correctly recognizes -1 as a signal number in this context and would instead report a missing PID argument.

Affected products

• Uutils coreutils: before 0.6.0 — fixed in 0.6.0

How to fix

Upgrade to a fixed version: Uutils coreutils 0.6.0. Check the vendor advisory for mitigations.

References

• https://github.com/uutils/coreutils/pull/9700
• https://github.com/uutils/coreutils/releases/tag/0.6.0

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