QEMU: slirp: heap buffer overflow in tcp_emu()
Published Mar 17, 2019
7.8
HIGHCVSS 3.0
EPSS 0.61%
Description
In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.
Affected products
No data.
Configuration 3
- 29
- 30
Configuration 4
- 14.04
- 16.04
- 18.04
- 18.10
No data.
Red Hat Enterprise Linux 6
qemu-kvm-2:0.12.1.2-2.506.el6_10.5
Fixed · RHSA-2019:2892
Red Hat Enterprise Linux 7
qemu-kvm-10:1.5.3-160.el7_6.3
Fixed · RHSA-2019:1883
Red Hat OpenStack Platform 10.0 (Newton)
qemu-kvm-rhev-10:2.12.0-33.el7
Fixed · RHSA-2019:2425
Red Hat OpenStack Platform 13.0 (Queens)
qemu-kvm-rhev-10:2.12.0-33.el7
Fixed · RHSA-2019:2425
Red Hat OpenStack Platform 14.0 (Rocky)
qemu-kvm-rhev-10:2.12.0-33.el7
Fixed · RHSA-2019:2425
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
qemu-kvm-rhev-10:2.12.0-18.el7_6.7
Fixed · RHSA-2019:1968
Red Hat Virtualization Engine 4.2
qemu-kvm-rhev-10:2.12.0-18.el7_6.7
Fixed · RHSA-2019:1968
Red Hat Virtualization Engine 4.3
qemu-kvm-rhev-10:2.12.0-18.el7_6.7
Fixed · RHSA-2019:1968
Red Hat Enterprise Linux 5
kvm
Will not fix
Red Hat Enterprise Linux 5
xen
Not affected
Red Hat Enterprise Linux 8
virt:rhel/qemu-kvm
Not affected
Red Hat OpenStack Platform 8 (Liberty)
qemu-kvm-rhev
Out of support scope
Red Hat OpenStack Platform 9 (Mitaka)
qemu-kvm-rhev
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | qemu-kvm-2:0.12.1.2-2.506.el6_10.5 | Fixed | RHSA-2019:2892 |
| Red Hat Enterprise Linux 7 | qemu-kvm-10:1.5.3-160.el7_6.3 | Fixed | RHSA-2019:1883 |
| Red Hat OpenStack Platform 10.0 (Newton) | qemu-kvm-rhev-10:2.12.0-33.el7 | Fixed | RHSA-2019:2425 |
| Red Hat OpenStack Platform 13.0 (Queens) | qemu-kvm-rhev-10:2.12.0-33.el7 | Fixed | RHSA-2019:2425 |
| Red Hat OpenStack Platform 14.0 (Rocky) | qemu-kvm-rhev-10:2.12.0-33.el7 | Fixed | RHSA-2019:2425 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | qemu-kvm-rhev-10:2.12.0-18.el7_6.7 | Fixed | RHSA-2019:1968 |
| Red Hat Virtualization Engine 4.2 | qemu-kvm-rhev-10:2.12.0-18.el7_6.7 | Fixed | RHSA-2019:1968 |
| Red Hat Virtualization Engine 4.3 | qemu-kvm-rhev-10:2.12.0-18.el7_6.7 | Fixed | RHSA-2019:1968 |
| Red Hat Enterprise Linux 5 | kvm | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | xen | Not affected | n/a |
| Red Hat Enterprise Linux 8 | virt:rhel/qemu-kvm | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | qemu-kvm-rhev | Out of support scope | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | qemu-kvm-rhev | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat OpenStack Platform: This flaw impacts KVM user-mode or SLIRP networking, which is not used in Red Hat OpenStack. Updating is recommended, however Red Hat OpenStack installs are not vulnerable to the described flaw due to the vulnerable feature not being used.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.61% (0.00610) | 47.32th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.61% (0.00615) | 44.56th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00103) | 25.77th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00060) | 27.54th | v3 (v2023.03.01) |
| Jun 7, 2024 | 0.06% (0.00060) | 25.43th | v3 (v2023.03.01) |
| Mar 10, 2024 | 0.06% (0.00060) | 23.41th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00051) | 18.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.84% (0.05839) | 77.39th | v2 (v2022.01.01) |
| Feb 3, 2022 | 14.63% (0.14629) | 89.77th | v1 |
| Jan 6, 2022 | 14.63% (0.14629) | 89.65th | v1 |
| Sep 1, 2021 | 3.68% (0.03679) | 82.80th | v1 |
| Apr 14, 2021 | 3.68% (0.03679) | 0.00th | v1 |
References (21)
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00073.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00001.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html vendor-advisoryx_refsource_SUSE
- http://www.openwall.com/lists/oss-security/2019/01/24/5 x_refsource_MISCMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/106758 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:1883 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:1968 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:2425 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:2892 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2019-6778 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1664205 Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/ vendor-advisoryx_refsource_FEDORA
- https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg03132.html x_refsource_MISCMailing ListPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-6778
- https://seclists.org/bugtraq/2019/May/76 mailing-listx_refsource_BUGTRAQ
- https://usn.ubuntu.com/3923-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-6778
- https://www.debian.org/security/2019/dsa-4454 vendor-advisoryx_refsource_DEBIAN
Change history (0)
No recorded changes yet.