Answer in brief
CVE-2026-98390 records a Unknown severity vulnerability in x86/amd_node: Avoid divide by zero on virtualized systems. 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 | >=0a4b61d9c2e496b5f0a10e29e355a1465c8738bb <9273a90465d58b82aca4bea71451ef6bee084928 || >=0a4b61d9c2e496b5f0a10e29e355a1465c8738bb <94e984d8858a3228952b02f84e66610961098cc2 || >=0a4b61d9c2e496b5f0a10e29e355a1465c8738bb <72bd92bd8190d7869ecb462649ca40f297822a33 || c4ad899a33198ab6335732c769835d035e66894a || >=6.17.8 <6.18 | 9273a90465d58b82aca4bea71451ef6bee084928, 94e984d8858a3228952b02f84e66610961098cc2, 72bd92bd8190d7869ecb462649ca40f297822a33, 6.18 |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 14, 2026
In the Linux kernel, the following vulnerability has been resolved: x86/amd_node: Avoid divide by zero on virtualized systems On a virtualized system, the number of nodes does not have a relationship to the number of roots. A Xen PVH dom0 can calculate roots_per_node as 0, which crashes with a divide by zero in: if (count++ % roots_per_node) because the underlying topology code on Xen ends up making num_nodes 2 and num_roots 1 and the integer division result is 0. The issue is seen with Xen, but it could affect other systems. Set roots_per_node to 1 in this case. Print a firmware bug when this is performed for non-virtualized systems. [ bp: Massage commit message. ]
Quoted source text, attributed separately from HOL analysis.