NULL pointer dereference in Qemu
CVE-2020-35505
A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Qemu — versions 6.0.0
- Debian Linux — versions 10.0
- Qemu — versions qemu 6.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2021/04/16/3 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/04/16/3 (Patch, Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- security.netapp.com/advisory/ntap-20210713-0006/ (Third Party Advisory)
- security.gentoo.org/glsa/202208-27 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/09/msg00008.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-35505?
- CVE-2020-35505 is a medium-severity vulnerability in Qemu, classified under NULL Pointer Dereference. CVSS score: 4.4/10. Published 2021-05-28.
- How severe is CVE-2020-35505?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2020-35505 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.