Out-of-bounds read information disclosure in qemu-kvm
Priority LOW 29CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
A heap out-of-bounds memory read flaw was found in the virtual nvme device in QEMU. The QEMU process does not validate an offset provided by the guest before computing a host heap pointer, which is used for copying data back to the guest. Arbitrary heap memory relative to an allocated buffer can be disclosed.
Why it matters now
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Fixed qemu-kvm: 8.1.0
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 |
|---|---|---|---|---|---|
| — | qemu-kvm | — | 8.1.0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 8 Advanced Virtualization | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | Not affected | CNA |
| Fedora | Fedora | — | — | No fix listed | CNA |
| Fedora | Extra Packages for Enterprise Linux | — | — | Not affected | CNA |
- qemu-kvm Vendor— Affected — Fixed in 8.1.0 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 8 Advanced Virtualization VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — Not affected CNA
- Fedora VendorFedora Affected — Fixed in — No fix listed CNA
- Extra Packages for Enterprise Linux VendorFedora Affected — Fixed in — Not affected CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* | 8.0.0 to before 8.1.0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:8.1.0:rc0:*:*:*:*:*:* | 8.1.0 rc0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:8.1.0:rc1:*:*:*:*:*:* | 8.1.0 rc1 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:8.1.0:rc2:*:*:*:*:*:* | 8.1.0 rc2 | Vulnerable | QEMU |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.1.0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:8.1.0:rc0:*:*:*:*:*:* Versions 8.1.0 rc0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:8.1.0:rc1:*:*:*:*:*:* Versions 8.1.0 rc1 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:8.1.0:rc2:*:*:*:*:*:* Versions 8.1.0 rc2 Vulnerable ·QEMU
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA qemu-kvm Fixed in 8.1.0
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 8 Advanced Virtualization
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-4135
- 2026-10-03 Alias added: GHSA-fw85-m9vg-m8jv
References
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Sources
- CVE-2023-4135 · CVE Program
- CVE-2023-4135 · NVD
- FIRST EPSS
- GHSA-fw85-m9vg-m8jv · GitHub Advisory Database · CC BY 4.0
- CVE-2023-4135 · 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