QEMU: NULL pointer dereference issue in megasas-gen2 host bus adapter
Published Jun 2, 2021
6.0
MEDIUMCVSS 3.1
EPSS 0.27%
Description
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Affected products
- Vendor n/a Product QEMU Defaultn/a
- Version All QEMU versions before and including 6.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | QEMU | n/a |
|
Configuration 2
- 33
No data.
Red Hat Enterprise Linux 5
kvm
Not affected
Red Hat Enterprise Linux 6
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-ma
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-rhev
Not affected
Red Hat Enterprise Linux 8
virt:rhel/qemu-kvm
Not affected
Red Hat Enterprise Linux 8 Advanced Virtualization
virt:8.2/qemu-kvm
Not affected
Red Hat Enterprise Linux 8 Advanced Virtualization
virt:8.3/qemu-kvm
Not affected
Red Hat Enterprise Linux 9
qemu-kvm
Not affected
Red Hat OpenStack Platform 10 (Newton)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 13 (Queens)
qemu-kvm-rhev
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kvm | Not affected | n/a |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-rhev | Not affected | n/a |
| Red Hat Enterprise Linux 8 | virt:rhel/qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 8 Advanced Virtualization | virt:8.2/qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 8 Advanced Virtualization | virt:8.3/qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 9 | qemu-kvm | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 13 (Queens) | qemu-kvm-rhev | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect Red Hat Enterprise Linux, Red Hat OpenStack Platform and RHEL Advanced Virtualization, as the `qemu-kvm` package does not include support for the megasas-gen2 host bus adapter emulation.
References (5)
- https://access.redhat.com/security/cve/CVE-2020-35503 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1910346 x_refsource_MISCIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-35503
- https://security.netapp.com/advisory/ntap-20210720-0008/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-35503
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-35503 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1910346 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-35503 | ||
| https://security.netapp.com/advisory/ntap-20210720-0008/ | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2020-35503 |
Change history (0)
No recorded changes yet.