CVE-2021-4145

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Summary

CVECVE-2021-4145
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-01-25 20:15:00 UTC
Updated2022-09-28 19:54:00 UTC
DescriptionA 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.

Risk And Classification

Problem Types: CWE-476

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Qemu Qemu All All All All
Application Qemu Qemu 6.1.0 - All All
Application Qemu Qemu 6.1.0 rc0 All All
Application Qemu Qemu 6.1.0 rc1 All All
Application Qemu Qemu 6.1.0 rc2 All All
Application Qemu Qemu 6.1.0 rc3 All All
Application Qemu Qemu 6.1.0 rc4 All All
Application Qemu Qemu 6.2.0 rc0 All All
Application Qemu Qemu 6.2.0 rc1 All All
Application Qemu Qemu 6.2.0 rc2 All All
Application Qemu Qemu 6.2.0 rc3 All All
Application Qemu Qemu 6.2.0 rc4 All All
Operating System Redhat Enterprise Linux 8.0 All All All

References

ReferenceSourceLinkTags
block/mirror: fix NULL pointer dereference in mirror_wait_on_conflicts() (66fed30c) · Commits · QEMU / QEMU · GitLab MISC gitlab.com
CVE-2021-4145 QEMU Vulnerability in NetApp Products | NetApp Product Security CONFIRM security.netapp.com
QEMU: Multiple Vulnerabilities (GLSA 202208-27) — Gentoo security GENTOO security.gentoo.org
2034602 – (CVE-2021-4145) CVE-2021-4145 QEMU: NULL pointer dereference in mirror_wait_on_conflicts() in block/mirror.c MISC bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159771 Oracle Enterprise Linux Security Update for qemu (ELSA-2022-9344)
  • 159792 Oracle Enterprise Linux Security Update for virt:kvm_utils (ELSA-2022-9364)
  • 159858 Oracle Enterprise Linux Security Update for virt:ol and virt-devel:ol (ELSA-2022-1759)
  • 182495 Debian Security Update for qemu (CVE-2021-4145)
  • 240292 Red Hat Update for virt:rhel and virt-devel:rhel security (RHSA-2022:1759)
  • 710604 Gentoo Linux QEMU Multiple Vulnerabilities (GLSA 202208-27)
  • 900621 Common Base Linux Mariner (CBL-Mariner) Security Update for qemu-kvm (8346)
  • 900982 Common Base Linux Mariner (CBL-Mariner) Security Update for qemu (8347)
  • 902115 Common Base Linux Mariner (CBL-Mariner) Security Update for qemu (8347-1)
  • 940525 AlmaLinux Security Update for virt:rhel and virt-devel:rhel (ALSA-2022:1759)
  • 960314 Rocky Linux Security Update for virt:rhel and virt-devel:rhel (RLSA-2022:1759)
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