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CVE-2021-28693

MEDIUM
5.5
CVSS Score
Published: June 30, 2021 at 10:32 AM UTC
Updated: June 17, 2026 at 03:46 AM UTC
1 product affected across 1 vendorXen

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Xen· Xenwordpress-plugin
95%
v ≥ 4.13.x4.12.0 ≤ v ≤ 4.15.04.12.x4.13.x4.15.0 rc14.15.xxen-unstable
Vendor states this is fixed in next of 4.14.x (unaffected)
Vendor states this is fixed in 4.12 (unknown)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202107-30
x_refsource_MISCVendor Advisory
Source: [email protected]
https://xenbits.xenproject.org/xsa/advisory-372.txt

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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