VulnerabilityModified

CVE-2018-15469

An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service (crash).

MEDIUM 6.5EPSS 0.42%

Does this matter?

Lower severity and a low EPSS score (0.42%). Track it; it rarely justifies an emergency change on its own.

Description

An issue was discovered in Xen through 4.11.x. ARM never properly implemented grant table v2, either in the hypervisor or in Linux. Unfortunately, an ARM guest can still request v2 grant tables; they will simply not be properly set up, resulting in subsequent grant-related hypercalls hitting BUG() checks. An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service (crash).

CVSS 3.0: 6.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS: 0.42% probability · 36th percentile
CISA KEV: Not listed
Weakness: CWE-400
Affected: xen/xen · debian/debian linux
Source: cve@mitre.org

References

http://xenbits.xen.org/xsa/advisory-268.htmlPatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00013.htmlThird Party Advisory
https://security.gentoo.org/glsa/201810-06Third Party Advisory
http://xenbits.xen.org/xsa/advisory-268.htmlPatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00013.htmlThird Party Advisory
https://security.gentoo.org/glsa/201810-06Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.