CVE-2026-77159
NVD: A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. NVD: The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. NVD: 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.
5.5 Severity
MEDIUM EPSS
0.0016 (6) KEV
-
Source-published summary
NVD: A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. NVD: The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. NVD: 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.
Possible impact
Source describes admin privilege risk · local exposure. Possible impact: A local user may gain root or administrative-level privileges on affected systems.
Affected context
Affected product or version requires source confirmation.
Remediation / advisory
Remediation reference present; patch status requires confirmation in the linked advisory.
Why it matters
Source describes admin privilege risk · local exposure. Possible impact: A local user may gain root or administrative-level privileges on affected systems.; CVSS 5.5 (MEDIUM); EPSS percentile 6; not listed in KEV; Remediation reference present; patch status requires confirmation in the linked advisory; sources: NVD.
What to verify
Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.
Exposure hint
local exposure
Impact tags
Urgency reasons
Source-derived note
Summary derived from NVD description; unsafe procedural detail is not shown.
Redaction metadata
- source summary used
- True
- fallback summary used
- False
- unsafe procedural detail present
- false
- raw source displayed
- false
- public summary redacted
- true
Remediation handoff
Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.
Safety note
This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.