CVE-2018-19364

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-13 · updated 2026-06-17
Weakness: CWE-416

Description

hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an fid path while it is being accessed by a second thread, leading to (for example) a use-after-free outcome.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
Debian Linux: 8.0, 9.0
Fedoraproject Fedora: 29
openSUSE Leap: 42.3
QEMU: through 3.0.0; 3.1.0-rc0, 3.1.0-rc1

References

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
http://www.openwall.com/lists/oss-security/2018/11/20/1
https://lists.debian.org/debian-lts-announce/2019/01/msg00023.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg01139.html
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg02795.html
https://seclists.org/bugtraq/2019/May/76
https://usn.ubuntu.com/3826-1/
https://www.debian.org/security/2019/dsa-4454
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
http://www.openwall.com/lists/oss-security/2018/11/20/1
https://lists.debian.org/debian-lts-announce/2019/01/msg00023.html

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