CVE-2021-4145
QEMU: NULL pointer dereference in mirror_wait_on_conflicts() in block/mirror.c
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Se encontró un problema de desreferencia de puntero NULL en la capa de réplica de bloques de QEMU en versiones anteriores a 6.2.0. El puntero "self" es dereferenciado en mirror_wait_on_conflicts() sin asegurar que no sea NULL. Un usuario malicioso no privilegiado dentro del huésped podría usar este fallo para bloquear el proceso de QEMU en el host cuando la escritura de datos alcanza el umbral del nodo de reflejo
A NULL pointer dereference issue was found in the block mirror layer of QEMU. 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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-12-21 CVE Reserved
- 2022-01-25 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| https://security.netapp.com/advisory/ntap-20220311-0004 | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2034602 | 2022-05-10 | |
| https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd | 2022-09-28 |
| URL | Date | SRC |
|---|---|---|
| https://security.gentoo.org/glsa/202208-27 | 2022-09-28 | |
| https://access.redhat.com/security/cve/CVE-2021-4145 | 2022-05-10 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 6.1.0 Search vendor "Qemu" for product "Qemu" and version "6.1.0" | - |
Affected
| ||||||
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 6.1.0 Search vendor "Qemu" for product "Qemu" and version "6.1.0" | rc0 |
Affected
| ||||||
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 6.1.0 Search vendor "Qemu" for product "Qemu" and version "6.1.0" | rc1 |
Affected
| ||||||
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 6.1.0 Search vendor "Qemu" for product "Qemu" and version "6.1.0" | rc2 |
Affected
| ||||||
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 6.1.0 Search vendor "Qemu" for product "Qemu" and version "6.1.0" | rc3 |
Affected
| ||||||
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 6.1.0 Search vendor "Qemu" for product "Qemu" and version "6.1.0" | rc4 |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
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