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TI-2023-02681 Aliases CVE-2023-2861GHSA-6mxq-x623-25h9

Qemu: 9pfs: improper access control on special files

Priority MEDIUM 64CWE-284Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00376 31st percentileScored 2026-11-07
Fix Fixed qemu: 8.1.0-rc0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—qemu—8.1.0-rc0Patch availableCNA
  • qemu Vendor— Affected — Fixed in 8.1.0-rc0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*before 8.1.0VulnerableQEMU
  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions before 8.1.0 Vulnerable ·QEMU

Remediation

  • Fix · CNA qemu Fixed in 8.1.0-rc0

Vendor assessments

Red Hat

Red Hat rating: Low. 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

  1. 2026-10-02 Threatist record created from CVE-2023-2861
  2. 2026-10-03 Alias added: GHSA-6mxq-x623-25h9

References

Patch 1

Advisory 1

Other 3

  • TI-2024-16148 QEMU before 8.2.0 has an integer underflow, and resultant buffer overflow, via a TI… CVSS 3.1HIGH 8.8
  • TI-2022-02736 Uncontrolled resource consumption in QEMU CVSS 3.1HIGH 7.8
  • TI-2019-09678 The QMP migrate command in QEMU version 4.0.0 and earlier is vulnerable to OS command… CVSS 3.0CRITICAL 9.8
  • TI-2024-03326 Qemu-kvm: net: assertion failure in update_sctp_checksum() CVSS 3.1MEDIUM 5.5
  • TI-2023-22631 QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in… CVSS 3.1MEDIUM 5.5
  • TI-2015-07039 Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1. CVSS 3.0CRITICAL 10.0
See all 418 →

Sources

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