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:HExploitable 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 Hide 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 |
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