DEBIAN-CVE-2026-79603
Dashboard / Vulnerabilities / DEBIAN-CVE-2026-79603
Summary:
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.
Affected packages
Package
Name: xen
Purl: pkg:deb/debian/xen?arch=source&distro=bookworm
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
4.17.1+2-gb773c48e36-1
4.17.2+55-g0b56bed864-1
4.17.2+76-ge1f9cb16e2-1
4.17.2+76-ge1f9cb16e2-1~deb12u1
4.17.2-1
4.17.3+10-g091466ba55-1
4.17.3+10-g091466ba55-1.1
4.17.3+10-g091466ba55-1.1~exp1
4.17.3+10-g091466ba55-1.1~exp2
4.17.3+10-g091466ba55-1~deb12u1
4.17.3+36-g54dacb5c02-1
4.17.5+23-ga4e5191dc0-1
4.17.5+23-ga4e5191dc0-1+deb12u1
4.17.5+72-g01140da4e8-1
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
