High severity · published Jan 5, 2024
CVE-2023-34326
The caching invalidation guidelines from the AMD-Vi specification (48882—Rev 3.07-PUB—Oct 2022) is incorrect on some hardware, as devices will malfunction (see stale DMA mappings)…
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
The caching invalidation guidelines from the AMD-Vi specification (48882—Rev
3.07-PUB—Oct 2022) is incorrect on some hardware, as devices will malfunction
(see stale DMA mappings) if some fields of the DTE are updated but the IOMMU
TLB is not flushed.
Such stale DMA mappings can point to memory ranges not owned by the guest, thus
allowing access to unindented memory regions.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XE
Xen · Xen
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-34326
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-34326
Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-442.html
xenbits.xen.org
http://xenbits.xen.org/xsa/advisory-442.html
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