CVE-2026-97615
CVE CVE-2026-97615EUVD EUVD-2026-86746Published 2026-09-25T10:22:23.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.2.7; 5.11; patch: 6.18.53; 90c628dd47ff4178f645b34938470bf43d02d123 <994fd705ca498223d188024cde833739a9dddbd2; 90c628dd47ff4178f645b34938470bf43d02d123 <42e033c8f30fd2923ccac3373ae70797e521dae1; patch: 0; 90c628dd47ff4178f645b34938470bf43d02d123 <7a49e6b16f36b8e085521699adbca3e321b6dd0c; patch: 7.3-rc3
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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