CVE-2019-3016

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-01-31 · updated 2026-06-17
Weakness: CWE-200

Description

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.

Affected products

Linux kernel: from 4.16; 4.10

References

http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html
http://www.openwall.com/lists/oss-security/2020/01/30/4
https://bugzilla.redhat.com/show_bug.cgi?id=1792167
https://git.kernel.org/linus/1eff70a9abd46f175defafd29bc17ad456f398a7
https://git.kernel.org/linus/8c6de56a42e0c657955e12b882a81ef07d1d073e
https://git.kernel.org/linus/917248144db5d7320655dbb41d3af0b8a0f3d589
https://git.kernel.org/linus/a6bd811f1209fe1c64c9f6fd578101d6436c6b6e
https://git.kernel.org/linus/b043138246a41064527cf019a3d51d9f015e9796
https://lore.kernel.org/lkml/1580407316-11391-1-git-send-email-pbonzini%40redhat.com/
https://security.netapp.com/advisory/ntap-20200313-0003/
https://usn.ubuntu.com/4300-1/
https://usn.ubuntu.com/4301-1/

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