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Fencer Vulns
high 7.8

CVE-2019-13164 json

qemu-bridge-helper.c in QEMU 3.1 and 4.0.0 does not ensure that a network interface name (obtained from bridge.conf or a --br=bridge option…

published 2019-07-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-4691

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

qemu-bridge-helper.c in QEMU 3.1 and 4.0.0 does not ensure that a network interface name (obtained from bridge.conf or a --br=bridge option) is limited to the IFNAMSIZ size, which can lead to an ACL bypass.

Patch / fix

  • qemu Debian 14, Debian 13, Debian 12 1:4.1-1

debian advisories DEBIAN-CVE-2019-13164

  • qemu Ubuntu 16.04 LTS 1:2.5+dfsg-5ubuntu10.42
  • qemu Ubuntu 18.04 LTS 1:2.11+dfsg-1ubuntu7.20
  • qemu Ubuntu Pro 14.04 LTS 2.0.0+dfsg-2ubuntu1.47

ubuntu advisories UBUNTU-CVE-2019-13164

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qemu SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 2.11.2-5.18.1
  • qemu SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 2.6.2-41.55.1
  • qemu SLE Module for Server Applications 15, SLE Module for Basesystem 15 2.11.2-9.28.3
  • qemu SLE Module for Server Applications 15 SP1, SLE Module for Basesystem 15 SP1 3.1.1-9.3.3
  • qemu SLES for SAP 12 SP1, SLES 12 SP1-LTSS 2.3.1-33.26.1
  • kvm SLES 11 SP4-LTSS 1.4.2-60.27.1

suse advisories SUSE-SU-2019:2353-1SUSE-SU-2019:2157-1SUSE-SU-2019:2246-1SUSE-SU-2019:2221-1SUSE-SU-2019:14151-1SUSE-SU-2019:2192-1

  • qemu openSUSE Tumbleweed 6.1.0-32.1
  • qemu openSUSE Leap 15.0 2.11.2-lp150.7.25.1
  • qemu openSUSE Leap 15.1 3.1.1-lp151.7.3.3
  • qemu-testsuite openSUSE Leap 15.1 3.1.1-lp151.7.3.3
  • qemu-linux-user openSUSE Leap 15.1 3.1.1-lp151.7.3.2

opensuse advisories openSUSE-SU-2024:11287-1openSUSE-SU-2019:2059-1openSUSE-SU-2019:2041-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-13164 updated cvss 2.5

Qemu: qemu-bridge-helper ACL can be bypassed when names are too long

  • Red Hat Enterprise Linux 7 qemu-img, qemu-kvm, libcacard, qemu-img-ma, qemu-kvm-ma, qemu-kvm-rhev, +6 more Red Hat Enterprise Linux 8 qemu-img, qemu-kvm, qemu-kvm-core, qemu-kvm-tests, qemu-kvm-common, qemu-guest-agent, +8 more Red Hat Enterprise Linux 8 Advanced Virtualization qemu-img, qemu-kvm, qemu-kiwi, qemu-kvm-core, qemu-kvm-tests, qemu-kvm-common, +9 more Red Hat OpenStack Platform 9 (Mitaka) qemu-img-rhev, qemu-kvm-rhev, libcacard-rhev, qemu-kvm-tools-rhev, libcacard-devel-rhev, libcacard-tools-rhev, +1 more Red Hat OpenStack Platform 10 (Newton) qemu-img-rhev, qemu-kvm-rhev, qemu-kvm-tools-rhev, qemu-kvm-common-rhev Red Hat OpenStack Platform 13 (Queens) qemu-img-rhev, qemu-kvm-rhev, qemu-kvm-tools-rhev, qemu-kvm-common-rhev
    affected: workaround, no fix available “This flaw can only be exploited if `/etc/qemu*/bridge.conf` contains a line containing `allow all` or at least one line with a bridge name of at least 15 characters.”
  • Red Hat OpenStack Platform 14 (Rocky) qemu-img-rhev, qemu-kvm-rhev, qemu-kvm-tools-rhev, qemu-kvm-common-rhev
    affected: workaround, no fix planned “This flaw can only be exploited if `/etc/qemu*/bridge.conf` contains a line containing `allow all` or at least one line with a bridge name of at least 15 characters.”
  • Red Hat Enterprise Linux 6 qemu-img, qemu-kvm, qemu-kvm-tools, qemu-guest-agent, qemu-guest-agent-win32 Red Hat Virtualization 4 redhat-virtualization-host-image-update
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.