ALPINE-CVE-2026-79603

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Source
https://security.alpinelinux.org/vuln/CVE-2026-79603
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-79603.json
JSON Data
https://api.test.osv.dev/v1/vulns/ALPINE-CVE-2026-79603
Upstream
  • CVE-2026-79603
Published
2026-09-08T13:17:27Z
Modified
2026-09-25T15:30:02Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen (if needed) when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbed page.

References

Affected packages

Alpine:v3.21 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.19.6-r1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-79603.json"

Alpine:v3.22 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.20.4-r1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-79603.json"

Alpine:v3.23 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.20.4-r1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-79603.json"

Alpine:v3.24 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.21.2-r1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-79603.json"