Description
Directory traversal vulnerability in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to access host files outside the export path via a .. (dot dot) in an unspecified string.
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 | 1:2.6+dfsg-3.1 | — |
| Debian 13 | qemu | 1:2.6+dfsg-3.1 | — |
| Debian 12 | qemu | 1:2.6+dfsg-3.1 | — |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u8 | DLA-1599-1 |
| Debian 7 | qemu +1 | 1.1.2+dfsg-6+deb7u15 | DLA-619-1, DLA-618-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.6 | USN-3125-1 |
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.30 | USN-3125-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | qemu | 2.3.1-21.1 | SUSE-SU-2016:2589-1 |
| SLES 12 | qemu | 2.0.2-48.22.1 | SUSE-SU-2016:2781-1 |
| SLES 11 SP4 | kvm | 1.4.2-47.1 | SUSE-SU-2016:2628-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | qemu | 2.3.1-21.1 | SUSE-SU-2016:2589-1 |
| SLES for SAP 12 | qemu | 2.0.2-48.22.1 | SUSE-SU-2016:2781-1 |
| SLES for SAP 11 SP4 | kvm | 1.4.2-47.1 | SUSE-SU-2016:2628-1 |
Advisories 7
- DLA-618-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-619-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1599-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3125-1 qemu, qemu-kvm vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2016:2781-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2589-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2628-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [qemu-devel] 20160826 [PATCH v2 0/5] 9P security fixes mailing-list
- [oss-security] 20160830 Re: CVE request: Qemu: 9p: directory traversal flaw in 9p virtio backend mailing-list
- 92680 vdb-entry
- GLSA-201609-01 vendor-advisory
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=56f101ecce0eafd09e2daf1c4eeb1377d6959261
- [debian-lts-announce] 20181130 [SECURITY] [DLA 1599-1] qemu security update mailing-list
- [oss-security] 20160830 CVE request: Qemu: 9p: directory traversal flaw in 9p virtio backend mailing-list
- [qemu-devel] 20160830 [PATCH v4 0/3] 9pfs security fixes mailing-list