CVE-2023-2861
Publication date 30 June 2023
Last updated 13 April 2026
Ubuntu priority
Description
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| qemu | 25.10 questing |
Not affected
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Fixed 1:6.2+dfsg-2ubuntu6.16
|
|
| 20.04 LTS focal |
Fixed 1:4.2-3ubuntu6.28
|
|
| 18.04 LTS bionic | Ignored end of standard support | |
| 16.04 LTS xenial | Ignored end of standard support | |
| 14.04 LTS trusty | Ignored end of standard support | |
| kvmtool | 25.10 questing | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy |
Fixed 0.20170904-1.1ubuntu0.1~esm2
|
|
| 20.04 LTS focal |
Fixed 0.20170904-1ubuntu0.20.04.1~esm1
|
|
| 18.04 LTS bionic |
Fixed 0.20170904-1ubuntu0.18.04.1~esm1
|
|
| 16.04 LTS xenial |
Fixed 0.20151104-1ubuntu0.1~esm1
|
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| Parameter | Value |
|---|---|
| Base score |
6.0 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-6567-1
- QEMU vulnerabilities
- 8 January 2024
- USN-8172-1
- kvmtool vulnerabilities
- 13 April 2026