DEBIAN-CVE-2026-77159

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Source
https://security-tracker.debian.org/tracker/CVE-2026-77159
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77159.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-77159
Upstream
  • CVE-2026-77159
Published
2026-09-11T11:16:54Z
Modified
2026-09-12T11:00:08Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. A local attacker with access to the swtpm account can replace the logfile with a symlink, causing libvirtd (running as root) to transfer ownership of an arbitrary file to the swtpm user.

References

Affected packages

Debian:12 / libvirt

Package

Name
libvirt
Purl
pkg:deb/debian/libvirt?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

9.*
9.0.0-4
9.0.0-4+deb12u1
9.0.0-4+deb12u2
9.1.0-1
9.2.0-1
9.2.0-2
9.3.0-1
9.3.0-2
9.4.0-1
9.5.0-1
9.5.0-2
9.6.0-1
9.6.0-2
9.6.0-3
9.7.0-1
9.8.0-1
9.8.0-2
9.9.0-1
9.10.0-1
10.*
10.0.0-1
10.0.0-2
10.0.0-3
10.1.0-1
10.2.0-1
10.3.0-1
10.3.0-2
10.3.0-3
10.4.0-1
10.5.0-1
10.6.0-1
10.6.0-2
10.6.0-3
10.7.0-1
10.7.0-2
10.7.0-3
10.8.0-1
10.9.0-1
10.9.0-2
10.10.0-1
10.10.0-2
10.10.0-3
10.10.0-4
11.*
11.0.0-1
11.0.0-2
11.1.0-1
11.1.0-2
11.2.0-1
11.2.0-2
11.2.0-3
11.3.0-1
11.3.0-2~bpo12+1
11.3.0-2
11.3.0-3
11.4.0-1
11.5.0-1
11.6.0-1
11.7.0-1
11.8.0-1
11.8.0-2
11.9.0-1
11.9.0-2
11.10.0-1
11.10.0-2
12.*
12.0.0-1
12.1.0-1
12.2.0-1
12.3.0-1
12.4.0-1
12.5.0-1
12.6.0-1
12.7.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77159.json"

Debian:13 / libvirt

Package

Name
libvirt
Purl
pkg:deb/debian/libvirt?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

11.*
11.3.0-3
11.3.0-3+deb13u1
11.3.0-3+deb13u2
11.3.0-3+deb13u3
11.4.0-1
11.5.0-1
11.6.0-1
11.7.0-1
11.8.0-1
11.8.0-2
11.9.0-1
11.9.0-2
11.10.0-1
11.10.0-2
12.*
12.0.0-1
12.1.0-1
12.2.0-1
12.3.0-1
12.4.0-1
12.5.0-1
12.6.0-1
12.7.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77159.json"

Debian:14 / libvirt

Package

Name
libvirt
Purl
pkg:deb/debian/libvirt?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
12.7.0-1

Affected versions

11.*
11.3.0-3
11.4.0-1
11.5.0-1
11.6.0-1
11.7.0-1
11.8.0-1
11.8.0-2
11.9.0-1
11.9.0-2
11.10.0-1
11.10.0-2
12.*
12.0.0-1
12.1.0-1
12.2.0-1
12.3.0-1
12.4.0-1
12.5.0-1
12.6.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77159.json"