Answer in brief
CVE-2026-99287 records a Unknown severity vulnerability in xen-netback: Zero out sring pointers on unmap. 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 | >=2ac061ce97f413bfbbdd768f7d2e0fda2e8170df <87fd475dc4e354088f6534285388e7b061f54b35 || >=2ac061ce97f413bfbbdd768f7d2e0fda2e8170df <c5f54af611ff6fe1d53fa05d8e87b469dc56122b || >=2ac061ce97f413bfbbdd768f7d2e0fda2e8170df <e7ba61734d6ad6adfd5bf617052e590743211669 | 87fd475dc4e354088f6534285388e7b061f54b35, c5f54af611ff6fe1d53fa05d8e87b469dc56122b, e7ba61734d6ad6adfd5bf617052e590743211669 |
| Linux/Linuxgeneric | 5.5 | Not reported |
Published upstream
Nov 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 10, 2026
In the Linux kernel, the following vulnerability has been resolved: xen-netback: Zero out sring pointers on unmap If xenvif_map_frontend_data_rings() fails when a ring is already mapped, it unmaps them via xenvif_unmap_frontend_data_rings() which keeps the ring pointers unchanged. xenvif_connect_data()'s cleanup path calls xenvif_disconnect_queue() which in turn calls xenvif_unmap_frontend_data_rings() again, which will attempt to unmap the pointers a second time. Zero out the ring pointers after they are unmapped to avoid this issue. This is XSA-532
Quoted source text, attributed separately from HOL analysis.