Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix _gaccess_shadow_fault() In some circumstances, it is possible that the page of nested guest memory that is being shadowed is not present at all in the parent guest gmap. dat_entry_walk() will not find any leaf entry and return with -ENOENT, which will erroneously be propagated all the way to userspace. Fix by manually calling gmap_link() on the memory of the nested guest that is being shadowed if the mapping was not already present.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e38c884df92119d96f652d51f82661dd2fc0b885 before 94c43c7df46433ed4d1e18f13770b019ba977bd8; affected e38c884df92119d96f652d51f82661dd2fc0b885 before faff4c8ff3dbec6d71b89dd281a0d17c4478fa44 |
| Linux / Linux | affected 7.0; unaffected 0 before 7.0; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.