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TI-2019-04814 Aliases CVE-2019-6778GHSA-4wxm-q46g-3mcf

In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.

Priority LOW 35CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 14 fixed, 3 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.

Why it matters now

EPSS 0.0061 49th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 14 fixed, 3 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:a:qemu:qemu:3.0.0:*:*:*:*:*:*:*3.0.0VulnerableQEMU
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*15.0VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*42.3VulnerableopenSUSE
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*29VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*30VulnerableFedoraproject
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
  • cpe:2.3:a:qemu:qemu:3.0.0:*:*:*:*:*:*:* Versions 3.0.0 Vulnerable ·QEMU
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* Versions 42.3 Vulnerable ·openSUSE
  • cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* Versions 29 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical

Remediation

Red Hat 4 advisories

  • RHSA-2019:2892 Released 2019-09-24 · Red Hat rating Important
    qemu-kvm security update
    • Red Hat Enterprise Linux Desktop (v. 6) qemu-guest-agent-2:0.12.1.2-2.506.el6_10.5, qemu-img-2:0.12.1.2-2.506.el6_10.5, qemu-kvm-2:0.12.1.2-2.506.el6_10.5 +1
    • Red Hat Enterprise Linux HPC Node (v. 6) qemu-guest-agent-2:0.12.1.2-2.506.el6_10.5, qemu-img-2:0.12.1.2-2.506.el6_10.5, qemu-kvm-2:0.12.1.2-2.506.el6_10.5 +1
    • Red Hat Enterprise Linux Server (v. 6) qemu-guest-agent-2:0.12.1.2-2.506.el6_10.5, qemu-img-2:0.12.1.2-2.506.el6_10.5, qemu-kvm-2:0.12.1.2-2.506.el6_10.5 +1
    • Red Hat Enterprise Linux Workstation (v. 6) qemu-guest-agent-2:0.12.1.2-2.506.el6_10.5, qemu-img-2:0.12.1.2-2.506.el6_10.5, qemu-kvm-2:0.12.1.2-2.506.el6_10.5 +1
  • RHSA-2019:2425 Released 2019-08-09 · Red Hat rating Important
    qemu-kvm-rhev security and bug fix update
    • Red Hat OpenStack Platform 10.0 qemu-img-rhev-10:2.12.0-33.el7, qemu-kvm-common-rhev-10:2.12.0-33.el7, qemu-kvm-rhev-10:2.12.0-33.el7 +1
    • Red Hat OpenStack Platform 13.0 qemu-img-rhev-10:2.12.0-33.el7, qemu-kvm-common-rhev-10:2.12.0-33.el7, qemu-kvm-rhev-10:2.12.0-33.el7 +1
    • Red Hat OpenStack Platform 14.0 qemu-img-rhev-10:2.12.0-33.el7, qemu-kvm-common-rhev-10:2.12.0-33.el7, qemu-kvm-rhev-10:2.12.0-33.el7 +1
  • RHSA-2019:1968 Released 2019-07-30 · Red Hat rating Important
    qemu-kvm-rhev security and bug fix update
    • RHV-M 4.2 qemu-img-rhev-10:2.12.0-18.el7_6.7, qemu-kvm-common-rhev-10:2.12.0-18.el7_6.7, qemu-kvm-rhev-10:2.12.0-18.el7_6.7 +1
    • RHV-M 4.3 qemu-img-rhev-10:2.12.0-18.el7_6.7, qemu-kvm-common-rhev-10:2.12.0-18.el7_6.7, qemu-kvm-rhev-10:2.12.0-18.el7_6.7 +1
    • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts qemu-img-rhev-10:2.12.0-18.el7_6.7, qemu-kvm-common-rhev-10:2.12.0-18.el7_6.7, qemu-kvm-rhev-10:2.12.0-18.el7_6.7 +1
Show 1 more Red Hat advisories
  • RHSA-2019:1883 Released 2019-07-29 · Red Hat rating Important
    qemu-kvm security update
    • Red Hat Enterprise Linux Client (v. 7) qemu-img-10:1.5.3-160.el7_6.3, qemu-kvm-10:1.5.3-160.el7_6.3, qemu-kvm-common-10:1.5.3-160.el7_6.3 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img-10:1.5.3-160.el7_6.3, qemu-kvm-10:1.5.3-160.el7_6.3, qemu-kvm-common-10:1.5.3-160.el7_6.3 +1
    • Red Hat Enterprise Linux Server (v. 7) qemu-img-10:1.5.3-160.el7_6.3, qemu-kvm-10:1.5.3-160.el7_6.3, qemu-kvm-common-10:1.5.3-160.el7_6.3 +1
    • Red Hat Enterprise Linux Workstation (v. 7) qemu-img-10:1.5.3-160.el7_6.3, qemu-kvm-10:1.5.3-160.el7_6.3, qemu-kvm-common-10:1.5.3-160.el7_6.3 +1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat OpenStack Platform 8 (Liberty)AffectedNo fix planned: Out of support scope
Red Hat OpenStack Platform 9 (Mitaka)AffectedNo fix planned: Out of support scope
RHV-M 4.2Fixed RHSA-2019:1968
RHV-M 4.3Fixed RHSA-2019:1968
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:1883
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:1883
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2019:2892
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2019:2892
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2019:2892
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:1883
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2019:2892
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:1883
Red Hat OpenStack Platform 10.0Fixed RHSA-2019:2425
Red Hat OpenStack Platform 13.0Fixed RHSA-2019:2425
Red Hat OpenStack Platform 14.0Fixed RHSA-2019:2425
Red Hat Virtualization 4 Management Agent for RHEL 7 HostsFixed RHSA-2019:1968
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-6778
  2. 2026-10-03 Alias added: GHSA-4wxm-q46g-3mcf

References

Patch 2

Advisory 13

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences