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CVE-2026-77159VulnerabilityPublished Updated

qemutpmemulatorpreparehost() · Libvirt: unsafe chown

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-77159· Medium 5.5

Not known to be exploited · CVSS 5.5 Medium.

Data as of 7 Nov 2026, 12:47 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.15.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10libvirtAffected–Fixed in–
Red Hat Enterprise Linux 6libvirtAffected–Fixed in–
Red Hat Enterprise Linux 7libvirtAffected–Fixed in–
Red Hat Enterprise Linux 8virt:rhel/libvirtAffected–Fixed in–
Red Hat Enterprise Linux 9libvirtAffected–Fixed in–

Description

A vulnerability in Libvirt's qemutpmemulatorpreparehost() function allows an unsafe chown operation that can be exploited via a symlink to change arbitrary file ownership. This issue is identified as CVE-2026-77159 and affects version 3.0 of the product. No CVSS score or detailed impact information is provided.

References

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