CVE-2022-42335

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-25 · updated 2026-06-17
Weakness: CWE-476

Description

x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.

Affected products

Fedoraproject Fedora: 38
xen: 4.17.0

References

http://www.openwall.com/lists/oss-security/2023/04/25/1
http://xenbits.xen.org/xsa/advisory-430.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
https://security.gentoo.org/glsa/202402-07
https://xenbits.xenproject.org/xsa/advisory-430.txt
http://www.openwall.com/lists/oss-security/2023/04/25/1
http://xenbits.xen.org/xsa/advisory-430.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
https://security.gentoo.org/glsa/202402-07
https://xenbits.xenproject.org/xsa/advisory-430.txt

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