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7.8 High

CVE-2026-63622 Libvirt: swtpm privilege escalation via symlink following

Description

A flaw was found in libvirt. A local attacker, specifically a process running as the confined `swtpm` user, could exploit a symlink-following vulnerability in the `virFileChownFiles()` function. By planting a symbolic link within the `swtpm` state directory, the attacker could trick the root-level libvirt daemon into changing the ownership of an arbitrary file to the `swtpm` user. This allows for privilege escalation from the `swtpm` sandbox to root-level file ownership control.

CVSS 3.1 detail

Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitable with local access to the machine, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat Enterprise Linux for NVIDIA 26 Versions not published
Red Hat Enterprise Linux 10.0 Extended Update Support Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support Versions not published
Show the 8 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020260910092120.63 earliest → < 8080020260910092120.63b34585 8080020260910092120.63b34585
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020260910092120.63 earliest → < 8080020260910092120.63b34585 8080020260910092120.63b34585
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020260910092451 earliest → < 8060020260910092451.ad008a3a 8060020260910092451.ad008a3a
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020260910092451 earliest → < 8060020260910092451.ad008a3a 8060020260910092451.ad008a3a
Red Hat Enterprise Linux 7 Extended Lifecycle Support Versions not published
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020260916092751.522 earliest → < 8040020260916092751.522a0ee4 8040020260916092751.522a0ee4
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020260916092751.522 earliest → < 8040020260916092751.522a0ee4 8040020260916092751.522a0ee4

References

Timeline

  1. Published
  2. Last modified

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