CVE-2023-34321
Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation.
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
Description
Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory.
- CVSS 3.1
- 3.3 LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.26% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- xen/xen
- Source
- security@xen.org
References
- https://xenbits.xenproject.org/xsa/advisory-437.htmlPatch, Vendor Advisory
- http://xenbits.xen.org/xsa/advisory-437.html
- https://xenbits.xenproject.org/xsa/advisory-437.htmlPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.