The host_from_stream_offset function in arch_init.c in QEMU, when loading RAM during…
Priority MEDIUM 40CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- Partial Red Hat: 8 fixed, 5 without a fix
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
The host_from_stream_offset function in arch_init.c in QEMU, when loading RAM during migration, allows remote attackers to execute arbitrary code via a crafted (1) offset or (2) length value in savevm data.
Why it matters now
EPSS 0.04115 90th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 8 fixed, 5 without a fix
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:*:*:*:*:*:*:*:* | up to 2.1.3 | Vulnerable | QEMU |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:* | 7.3 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:* | 7.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:* | 7.5 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:* | 7.7 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* | 7.3 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* | 7.4 | Vulnerable | Red Hat |
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions up to 2.1.3 Vulnerable ·QEMU
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
Show 5 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* | 7.7 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:virtualization:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Running on | Red Hat |
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:virtualization:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Running on ·Red Hat
Remediation
Red Hat 2 advisories
- RHSA-2015:0624 Released 2015-03-05 · Red Hat rating Importantqemu-kvm-rhev security, bug fix, and enhancement update
- RHEV-H and VDSM for 7 Hosts libcacard-devel-rhev-10:2.1.2-23.el7, libcacard-rhev-10:2.1.2-23.el7, libcacard-tools-rhev-10:2.1.2-23.el7 +4
- RHSA-2015:0349 Released 2015-03-05 · Red Hat rating Importantqemu-kvm security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) libcacard-10:1.5.3-86.el7, qemu-img-10:1.5.3-86.el7, qemu-kvm-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Client Optional (v. 7) libcacard-devel-10:1.5.3-86.el7, libcacard-tools-10:1.5.3-86.el7
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcacard-10:1.5.3-86.el7, libcacard-devel-10:1.5.3-86.el7, libcacard-tools-10:1.5.3-86.el7 +4
- Red Hat Enterprise Linux Server (v. 7) libcacard-10:1.5.3-86.el7, qemu-img-10:1.5.3-86.el7, qemu-kvm-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Server Optional (v. 7) libcacard-10:1.5.3-86.el7, libcacard-10:1.5.3-86.el7.ppc, libcacard-devel-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Workstation (v. 7) libcacard-10:1.5.3-86.el7, qemu-img-10:1.5.3-86.el7, qemu-kvm-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Workstation Optional (v. 7) libcacard-devel-10:1.5.3-86.el7, libcacard-tools-10:1.5.3-86.el7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix yet |
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | Affected | — |
| Red Hat OpenStack Platform 3 | Affected | — |
| Red Hat OpenStack Platform 4 | Affected | — |
| RHEV-H and VDSM for 7 Hosts | Fixed | RHSA-2015:0624 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2015:0349 |
Timeline
- 2026-10-02 Threatist record created from CVE-2014-7840
- 2026-10-03 Alias added: GHSA-m2wj-gq82-h93m
References
Sources
- CVE-2014-7840 · CVE Program
- CVE-2014-7840 · NVD
- FIRST EPSS
- GHSA-m2wj-gq82-h93m · GitHub Advisory Database · CC BY 4.0
- CVE-2014-7840 · Red Hat security data · CC BY 4.0
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