Answer in brief
CVE-2026-97615 records a Unknown severity vulnerability in net: bridge: use option bits for CFM/MRP frame handlers. 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 | >=90c628dd47ff4178f645b34938470bf43d02d123 <994fd705ca498223d188024cde833739a9dddbd2 || >=90c628dd47ff4178f645b34938470bf43d02d123 <42e033c8f30fd2923ccac3373ae70797e521dae1 || >=90c628dd47ff4178f645b34938470bf43d02d123 <7a49e6b16f36b8e085521699adbca3e321b6dd0c | 994fd705ca498223d188024cde833739a9dddbd2, 42e033c8f30fd2923ccac3373ae70797e521dae1, 7a49e6b16f36b8e085521699adbca3e321b6dd0c |
| Linux/Linuxgeneric | 5.11 | Not reported |
Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 25, 2026
In the Linux kernel, the following vulnerability has been resolved: net: bridge: use option bits for CFM/MRP frame handlers CFM and MRP register a global br_frame_type whose hlist_node is linked into the per-bridge frame_type_list when the first MEP/MRP instance is created. Enabling the protocol on multiple bridges therefore inserts the same node into multiple lists. Unregistering it on one bridge then corrupts list state belonging to another. These handlers can only be installed once per bridge, and they are uncommon. Track their per-bridge enable state with net_bridge option bits, which already live on the Rx hot cache line, and dispatch the matching handler directly from the receive path. Check both bits together first as an unlikely case. Remove the generic frame_type_list and br_frame_type helpers, which have had no other users since CFM and MRP were added. That shrinks struct net_bridge by 8 bytes and drops the list walk from the fast path. When neither protocol is compiled in, BR_CFM_MRP_OPTS is 0 and the compiler prunes the branch.
Quoted source text, attributed separately from HOL analysis.