CVE-2016-9380

7.5 highEPSS 0.4%

High (7.5). EPSS 0.4% chance of exploitation in the next 30 days.

The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2017-01-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

citrix:xenserver
xen:xen

References

http://www.securityfocus.com/bid/94473
http://www.securitytracker.com/id/1037347
http://xenbits.xen.org/xsa/advisory-198.html
http://xenbits.xen.org/xsa/xsa198.patch
https://security.gentoo.org/glsa/201612-56

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