CVE-2018-20191

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-20 · updated 2026-06-17
Weakness: CWE-476

Description

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
Fedoraproject Fedora: 29, 30
QEMU: through 3.1.0

References

http://www.openwall.com/lists/oss-security/2018/12/18/1
http://www.securityfocus.com/bid/106276
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/
https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg03066.html
https://usn.ubuntu.com/3923-1/
http://www.openwall.com/lists/oss-security/2018/12/18/1
http://www.securityfocus.com/bid/106276
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/
https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg03066.html
https://usn.ubuntu.com/3923-1/

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