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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | qemu | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qemu | 1:8.0.3+dfsg-1 | — |
| Debian 13 | qemu | 1:8.0.3+dfsg-1 | — |
| Debian 12 | qemu | 1:7.2+dfsg-7+deb12u1 | — |
| Debian 10 | qemu | 1:3.1+dfsg-8+deb10u12 | DLA-3759-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | qemu | 1:6.2+dfsg-2ubuntu6.16 | USN-6567-1 |
| Ubuntu 20.04 LTS | qemu | 1:4.2-3ubuntu6.28 | USN-6567-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | kvmtool | 0.20170904-1.1ubuntu0.1~esm2 | — |
| Ubuntu Pro 20.04 LTS | kvmtool | 0.20170904-1ubuntu0.20.04.1~esm1 | — |
| Ubuntu Pro 18.04 LTS | kvmtool | 0.20170904-1ubuntu0.18.04.1~esm1 | — |
| Ubuntu Pro 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.42+esm5 | — |
| Ubuntu Pro 16.04 LTS | kvmtool | 0.20151104-1ubuntu0.1~esm1 | — |
| Ubuntu Pro 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.51+esm4 | — |
| Ubuntu Pro 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.47+esm6 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | qemu | 7.1.0-150500.49.6.1 | SUSE-SU-2023:3082-1 |
| SLES 15 SP4 | qemu | 6.2.0-150400.37.20.1 | SUSE-SU-2023:3234-1 |
| SLES 15 SP3 | qemu | 5.2.0-150300.130.1 | SUSE-SU-2024:2977-1 |
| SLES 15 SP2 | qemu | 4.2.1-150200.79.1 | SUSE-SU-2023:3721-1 |
| SLES 15 SP1 | qemu | 3.1.1.1-150100.80.51.5 | SUSE-SU-2023:3800-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | qemu | 3.1.1.1-69.1 | SUSE-SU-2023:3015-1 |
| SLES for SAP 15 SP3 | qemu | 5.2.0-150300.130.1 | SUSE-SU-2024:2977-1 |
| SLES for SAP 15 SP2 | qemu | 4.2.1-150200.79.1 | SUSE-SU-2023:3721-1 |
| SLES for SAP 15 SP1 | qemu | 3.1.1.1-150100.80.51.5 | SUSE-SU-2023:3800-1 |
| SLES for SAP 12 SP5 | qemu | 3.1.1.1-69.1 | SUSE-SU-2023:3015-1 |
| SLE Micro 5.5 | qemu | 7.1.0-150500.49.6.1 | SUSE-SU-2023:3082-2 |
| SLE Micro 5.4 | qemu | 6.2.0-150400.37.20.1 | SUSE-SU-2023:3234-1 |
| SLE Micro 5.3 | qemu | 6.2.0-150400.37.20.1 | SUSE-SU-2023:3234-1 |
| SLE Micro 5.2 | qemu | 5.2.0-150300.130.1 | SUSE-SU-2024:2977-1 |
| SLE Micro 5.1 | qemu | 5.2.0-150300.130.1 | SUSE-SU-2024:2977-1 |
| SLE HPC 15 SP3 | qemu | 5.2.0-150300.130.1 | SUSE-SU-2024:2977-1 |
| SLE HPC 15 SP2 | qemu | 4.2.1-150200.79.1 | SUSE-SU-2023:3721-1 |
| SLE HPC 15 SP1 | qemu | 3.1.1.1-150100.80.51.5 | SUSE-SU-2023:3800-1 |
| SUSE Enterprise Storage 7.1 | qemu | 5.2.0-150300.130.1 | SUSE-SU-2024:2977-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 8.0.3-1.1 | openSUSE-SU-2024:13058-1 |
| openSUSE Leap 15.5 | qemu | 7.1.0-150500.49.6.1 | SUSE-SU-2023:3082-1 |
| openSUSE Leap 15.4 | qemu | 4.2.1-150200.79.1 | SUSE-SU-2023:3721-1, SUSE-SU-2023:3234-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | qemu | 6.2.0-150400.37.20.1 | SUSE-SU-2023:3234-1 |
| openSUSE Leap Micro 5.3 | qemu | 6.2.0-150400.37.20.1 | SUSE-SU-2023:3234-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | qemu | 8.0.2-r1 | — |
| Alpine v3.23 | qemu | 8.0.2-r1 | — |
| Alpine v3.22 | qemu | 8.0.2-r1 | — |
| Alpine v3.21 | qemu | 8.0.2-r1 | — |
| Alpine v3.20 | qemu | 8.0.2-r1 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | qemu | 8.0.2-r1 | — |
| Alpine v3.18 | qemu | 8.0.2-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qemu +26 | 10:3.1.0-8.amzn2.0.11 | ALAS2-2023-2148 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | qemu | 8.2.0-1 | — |
| Azure Linux 2 (CBL-Mariner) | qemu | 6.2.0-23 | — |
Advisories 15
- WID-SEC-2023-1621 QEMU: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Jun 29, 2026
- USN-6567-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3759-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:3721-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3015-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3234-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2977-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3082-2 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3800-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3082-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13058-1 qemu-8.0.3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2023-2148 Moderate: qemu security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 23, 2025
- ICSA-24-046-11 Siemens SCALANCE XCM-/XRM-300 CISA ICS & IT advisories · Feb 13, 2024
- SSA-806742 SSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4 Siemens ProductCERT · Feb 13, 2024
- WID-SEC-2023-1755 IBM InfoSphere Information Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 16, 2023