CVE-2022-26357
VT-d hardware may allow for only less than 15 bits to hold a domain ID associating a physical device with a particular domain.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
race in VT-d domain ID cleanup Xen domain IDs are up to 15 bits wide. VT-d hardware may allow for only less than 15 bits to hold a domain ID associating a physical device with a particular domain. Therefore internally Xen domain IDs are mapped to the smaller value range. The cleaning up of the housekeeping structures has a race, allowing for VT-d domain IDs to be leaked and flushes to be bypassed.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.26% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- xen/xen · debian/debian linux · fedoraproject/fedora
- Source
- security@xen.org
References
- http://www.openwall.com/lists/oss-security/2022/04/05/2Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-399.htmlPatch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/
- https://security.gentoo.org/glsa/202402-07
- https://www.debian.org/security/2022/dsa-5117Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-399.txtVendor Advisory
- http://www.openwall.com/lists/oss-security/2022/04/05/2Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-399.htmlPatch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/
- https://security.gentoo.org/glsa/202402-07
- https://www.debian.org/security/2022/dsa-5117Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-399.txtVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.