Description
The (1) v9fs_create and (2) v9fs_lcreate functions in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local guest OS privileged users to cause a denial of service (file descriptor or memory consumption) via vectors related to an already in-use fid.
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 | 1:2.8+dfsg-4 | — |
| Debian 13 | qemu | 1:2.8+dfsg-4 | — |
| Debian 12 | qemu | 1:2.8+dfsg-4 | — |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u7 | DLA-1497-1 |
| Debian 7 | qemu +1 | 1.1.2+dfsg-6+deb7u22 | DLA-1035-1, DLA-965-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.14 | USN-3289-1 |
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.34 | USN-3289-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | qemu | 2.6.2-41.16.1 | SUSE-SU-2017:1774-1 |
| SLES 12 SP1 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SLES 12 | qemu | 2.0.2-48.34.3 | SUSE-SU-2017:2969-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | qemu | 2.6.2-41.16.1 | SUSE-SU-2017:1774-1 |
| SLES for SAP 12 SP1 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SUSE OpenStack Cloud 6 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
Advisories 7
- DLA-965-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1497-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1035-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3289-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:1774-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2969-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2946-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
References
- [debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security update mailing-list
- [oss-security] 20170403 CVE-2017-7377 Qemu: 9pfs: host memory leakage via v9fs_create mailing-list
- GLSA-201706-03 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1437871
- http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=d63fb193e71644a073b77ff5ac6f1216f2f6cf6e
- [qemu-devel] 20170328 [PULL 1/2] 9pfs: fix file descriptor leak mailing-list
- 97319 vdb-entry