Vulnerability in Xen
CVE-2021-28693
xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must "scrub" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.
EPSS: 0.003 (24.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Xen — versions next of 4.14.x, unspecified, xen-unstable
References
- security@xen.org (x_refsource_MISC, Vendor Advisory)
- security@xen.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2021-28693?
- CVE-2021-28693 is a medium-severity vulnerability in Xen. CVSS score: 5.5/10. Published 2021-06-30.
- How severe is CVE-2021-28693?
- Medium severity. CVSS v3 base score is 5.5 out of 10.