CVE-2026-79610

NameCVE-2026-79610
DescriptionXSA-501 was about issues with v1 -> v2 and v2 -> v1 changes racing certain other grant table operations. Sadly a v2 -> v1 -> v2 change has yet another effect which wasn't accounted for: During the first change, status pages would be freed. During the second change they would be allocated again. Hence across the full pair of change the addresses of the status pages may change, rendering stale previously calculated pointers into the status array.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)bookworm4.17.5+72-g01140da4e8-1vulnerable
bookworm (security)4.17.7-0+deb12u1vulnerable
trixie (security), trixie4.20.3+127-gc42374a105-0+deb13u1vulnerable
forky, sid4.20.3+127-gc42374a105-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensource(unstable)(unfixed)

Notes

https://xenbits.xen.org/xsa/advisory-517.html

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