VDB
CVE-2020-35503
CVE-2020-35503
PUBLISHED
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.
EPSS 0.02% · 7.1th percentile
Risk Scores
EPSS Score
0.02%
7.1th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:22.04:LTS | qemu | 0, 1:6.0+dfsg-2expubuntu1, 1:6.0+dfsg-2expubuntu2 |
| Ubuntu:Pro:14.04:LTS | qemu | 2.0.0+dfsg-2ubuntu1.26, 2.0.0+dfsg-2ubuntu1.24, 2.0.0+dfsg-2ubuntu1.22 |
| Ubuntu:25.10 | qemu | 1:10.0.2+ds-1ubuntu2, 1:10.1.0+ds-1ubuntu1, 1:10.1.0+ds-5ubuntu2 |
| Ubuntu:Pro:18.04:LTS | qemu | 1:2.11+dfsg-1ubuntu7.15, 1:2.11+dfsg-1ubuntu7.17, 1:2.11+dfsg-1ubuntu7.18 |
| Ubuntu:20.04:LTS | qemu | 1:4.2-3ubuntu6.17, 1:4.0+dfsg-0ubuntu10, 1:4.2-1ubuntu1 |
| Ubuntu:Pro:16.04:LTS | qemu | 1:2.5+dfsg-1ubuntu5, *, * |
| Ubuntu:24.04:LTS | qemu | 1:8.0.4+dfsg-1ubuntu5, 1:8.0.4+dfsg-1ubuntu4, 1:8.1.3+ds-1ubuntu2 |
Timeline
- Jan 11, 2021 CVE Published
- Jun 3, 2021 EPSS Score
- Aug 5, 2021 EPSS Score
- Oct 5, 2021 EPSS Score
- Dec 5, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Apr 6, 2022 EPSS Score
- Jun 6, 2022 EPSS Score
- Aug 7, 2022 EPSS Score
- Oct 7, 2022 EPSS Score
- Dec 7, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-35503 third-party-advisory
- https://lists.gnu.org/archive/html/qemu-devel/2020-12/msg06065.html third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-35503 third-party-advisory