Medium severity · published Dec 29, 2016
CVE-2016-1922
QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
7.0; 8.0 · source: NVD
QE
Qemu · Qemu
through 2.5.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-1922
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-1922
Third Party Advisory
http://www.debian.org/security/2016/dsa-3469
Third Party Advisory
http://www.debian.org/security/2016/dsa-3470
Third Party Advisory
http://www.debian.org/security/2016/dsa-3471
Mailing List
http://www.openwall.com/lists/oss-security/2016/01/16/1
Mailing List
http://www.openwall.com/lists/oss-security/2016/01/16/6
Third Party Advisory
http://www.securityfocus.com/bid/81058
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