arch/x86/x86_emulate/x86_emulate.c in Xen 3.2.1 through 4.4.x does not properly check privileges, which allows local HVM guest users to gain privileges or cause a denial of service (crash) via a crafted (1) CALL, (2) JMP, (3) RETF, (4) LCALL, (5) LJMP, or (6) LRET far branch instruction.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | xen | < 4.4.1-4 | xen_4.4.1-4_all.deb |
Debian | 11 | all | xen | < 4.4.1-4 | xen_4.4.1-4_all.deb |
Debian | 10 | all | xen | < 4.4.1-4 | xen_4.4.1-4_all.deb |
Debian | 999 | all | xen | < 4.4.1-4 | xen_4.4.1-4_all.deb |
Debian | 13 | all | xen | < 4.4.1-4 | xen_4.4.1-4_all.deb |