CVEvulnerability
CVE-2021-4145
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-01-25
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.9 MEDIUM — AV:L/AC:L/Au:N/C:N/I:N/A:C
- Weaknesses
- CWE-476
Description
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.
Affected configurations
• qemu qemu 6.1.0
• redhat enterprise linux 8.0
Related
Weakness · CWE (1)
- CWE-476 NULL Pointer Dereference weakness
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2034602 Issue Tracking, Patch, Third Party Advisory
- https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220311-0004/ Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2034602 Issue Tracking, Patch, Third Party Advisory
- https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220311-0004/ Third Party Advisory