Answer in brief
CVE-2026-98653 records a Unknown severity vulnerability in KVM: s390: Fix _gaccess_shadow_fault(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e38c884df92119d96f652d51f82661dd2fc0b885 <94c43c7df46433ed4d1e18f13770b019ba977bd8 || >=e38c884df92119d96f652d51f82661dd2fc0b885 <faff4c8ff3dbec6d71b89dd281a0d17c4478fa44 | 94c43c7df46433ed4d1e18f13770b019ba977bd8, faff4c8ff3dbec6d71b89dd281a0d17c4478fa44 |
| Linux/Linuxgeneric | 7.0 | Not reported |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
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.
Quoted source text, attributed separately from HOL analysis.