An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.0 Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade xen | Aug 22, 2024 | Jul 2, 2018 |
| Debian | — | Upgrade xen | Jun 29, 2018 | Jun 27, 2018 |
| Gentoo Linux | — | Upgrade app-emulation/xen-tools.Upgrade app-emulation/xen. | Oct 31, 2018 | Jul 2, 2018 |
| Suse | — | Upgrade xen-libs-32bitUpgrade xenUpgrade xen-kmp-defaultUpgrade xen-libsUpgrade xen-doc-htmlUpgrade xen-doc-pdfUpgrade xen-kmp-paeUpgrade xen-develUpgrade xen-tools-domuUpgrade xen-toolsUpgrade xen-tools-xendomains-wait-disk | Jul 24, 2018 | Jun 27, 2018 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Jul 2, 2018 |
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