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TI-2020-18027 Aliases CVE-2020-35506GHSA-qfjc-pj3q-qmpf

Use after free in QEMU

Priority LOW 30CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process.

Why it matters now

EPSS 0.00366 30th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—QEMUqemu 6.0.0—No fix listedCNA
  • QEMU Vendor— Affected qemu 6.0.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*before 6.0.0VulnerableQEMU
  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions before 6.0.0 Vulnerable ·QEMU

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 8 products
  • Red Hat Enterprise Linux 5
  • 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
  • Red Hat OpenStack Platform 10 (Newton)
  • Red Hat OpenStack Platform 13 (Queens)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-35506
  2. 2026-10-03 Alias added: GHSA-qfjc-pj3q-qmpf

References

Advisory 5

  • 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-2023-02681 Qemu: 9pfs: improper access control on special files CVSS 3.1HIGH 7.1
  • 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
See all 418 →

Sources

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