Qemu has a Buffer Overflow in pcnet_receive in hw/net/pcnet.c because an incorrect integer data type is used.
Priority MEDIUM 40CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
Qemu has a Buffer Overflow in pcnet_receive in hw/net/pcnet.c because an incorrect integer data type is used.
Why it matters now
EPSS 0.04503 91st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 15
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:qemu:qemu:2.1.0:*:*:*:*:*:*:* | 2.1.0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.8.0:*:*:*:*:*:*:* | 2.8.0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.12.0:*:*:*:*:*:*:* | 2.12.0 | Vulnerable | QEMU |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* | 18.10 | Vulnerable | Canonical |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:oracle:linux:7:0:*:*:*:*:*:* | 7 0 | Vulnerable | Oracle |
- cpe:2.3:a:qemu:qemu:2.1.0:*:*:*:*:*:*:* Versions 2.1.0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.8.0:*:*:*:*:*:*:* Versions 2.8.0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.12.0:*:*:*:*:*:*:* Versions 2.12.0 Vulnerable ·QEMU
- 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
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:oracle:linux:7:0:*:*:*:*:*:* Versions 7 0 Vulnerable ·Oracle
Show 5 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:* | 11 sp3 | Vulnerable | SUSE |
| cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:* | 11 sp4 | Vulnerable | SUSE |
| cpe:2.3:o:suse:linux_enterprise_server:12:*:*:*:ltss:*:*:* | 12 | Vulnerable | SUSE |
| cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:*:*:* | 15 | Vulnerable | SUSE |
- cpe:2.3:o:redhat:linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:* Versions 11 sp3 Vulnerable ·SUSE
- cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:* Versions 11 sp4 Vulnerable ·SUSE
- cpe:2.3:o:suse:linux_enterprise_server:12:*:*:*:ltss:*:*:* Versions 12 Vulnerable ·SUSE
- cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:*:*:* Versions 15 Vulnerable ·SUSE
Remediation
Red Hat 1 advisory
- RHSA-2019:2892 Released 2019-09-24 · Red Hat rating Importantqemu-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
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| 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 Workstation (v. 6) | Fixed | RHSA-2019:2892 |
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2018-17962
- 2026-10-03 Alias added: GHSA-q23x-9vcw-j6c2
References
Advisory 8
- [oss-security] 20181008 Qemu: integer overflow issues
- DSA-4338
- USN-3826-1
- [debian-lts-announce] 20181130 [SECURITY] [DLA 1599-1] qemu security update
- RHSA-2019:2892
- https://access.redhat.com/security/cve/cve-2018-17962
- https://linux.oracle.com/cve/CVE-2018-17962.html
- https://www.suse.com/security/cve/CVE-2018-17962/
Sources
- CVE-2018-17962 · CVE Program
- CVE-2018-17962 · NVD
- FIRST EPSS
- GHSA-q23x-9vcw-j6c2 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-17962 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences