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chroot in GNU coreutils when used with --userspec allows local users to escape to the parent session via a crafted TIOCSTI ioctl call which pushes characters to the terminal's input buffer.

🗓️ 25 Sep 2020 07:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 3 Views

GNU coreutils chroot with --userspec allows local escape to the parent session via crafted terminal input control.

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Detection

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18 Feb 2026 09:26Current
6.8Medium risk
Vulners AI Score6.8
CVSS 22.1
CVSS 36.5
CVSS 3.14.6 - 6.5
EPSS0.00425
SSVC
3