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CVE Vulnerabilities

CVE-2020-35505

NULL Pointer Dereference

Published: May 28, 2021 | Modified: Jun 17, 2026
CVSS 3.x
4.4
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
2.1 LOW
AV:L/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
3.2 LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
Ubuntu
LOW
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-35505
CWEhttps://cwe.mitre.org/data/definitions/476.html

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.

Weakness

The product dereferences a pointer that it expects to be valid but is NULL.

Affected Software

NameVendorStart VersionEnd Version
QemuQemu*6.0.0 (excluding)
QemuQemu6.0.0-rc1 (including)6.0.0-rc1 (including)
QemuQemu6.0.0-rc2 (including)6.0.0-rc2 (including)
QemuUbuntubionic*
QemuUbuntudevel*
QemuUbuntuesm-infra-legacy/trusty*
QemuUbuntuesm-infra-legacy/xenial*
QemuUbuntuesm-infra/bionic*
QemuUbuntuesm-infra/focal*
QemuUbuntuesm-infra/xenial*
QemuUbuntufocal*
QemuUbuntugroovy*
QemuUbuntuhirsute*
QemuUbuntuimpish*
QemuUbuntujammy*
QemuUbuntukinetic*
QemuUbuntulunar*
QemuUbuntumantic*
QemuUbuntunoble*
QemuUbuntuoracular*
QemuUbuntuplucky*
QemuUbuntuquesting*
QemuUbunturesolute*
QemuUbuntustonking*
QemuUbuntutrusty*
QemuUbuntutrusty/esm*
QemuUbuntuxenial*
Qemu-kvmUbuntuprecise/esm*

Potential Mitigations

References

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