Vulnerability Database

296,147

Total vulnerabilities in the database

CVE-2021-4145

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The self pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.

  • Published: Jan 25, 2022
  • Updated: Apr 14, 2023
  • CVE: CVE-2021-4145
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.5
  • AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 4.9
  • AV:L/AC:L/Au:N/C:N/I:N/A:C

CWEs:

Software From Fixed in
qemu / qemu 6.1.0-rc1 6.1.0-rc1.x
qemu / qemu 6.1.0 6.1.0.x
qemu / qemu 6.1.0-rc2 6.1.0-rc2.x
qemu / qemu 6.1.0-rc3 6.1.0-rc3.x
qemu / qemu 6.1.0-rc4 6.1.0-rc4.x
qemu / qemu 6.1.0-rc0 6.1.0-rc0.x
redhat / enterprise_linux 8.0 8.0.x