Answer in brief
CVE-2026-98301 records a Unknown severity vulnerability in net: bridge: mst: move switchdev call outside rcu. 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 | >=8ca9a750fc711911ef616ceb627d07357b04545e <b9661fd2423fc25e91e0517ecc0b6156ad83e3a8 || >=4488617e5e995a09abe4d81add5fb165674edb59 <6b431b63219853eef4054e2f1cb073d2ca2059b4 || >=3a7c1661ae1383364cd6092d851f5e5da64d476b <abf734d150c61acfdfee102169d0e5d1c482e285 || >=3a7c1661ae1383364cd6092d851f5e5da64d476b <d5c4ee1fa4e83a12afc051c831936cd8e006cde3 || >=3a7c1661ae1383364cd6092d851f5e5da64d476b <c40ed3e884c8dc0350f26484030438ef24208ff1 || >=3a7c1661ae1383364cd6092d851f5e5da64d476b <18a6fe05fb6e18de29fa90d388bb34044114b3d8 || a2b01e65d9ba8af2bb086d3b7288ca53a07249ac || e43dd2b1ec746e105b7db5f9ad6ef14685a615a4 || >=6.1.93 <6.1.189 || >=6.6.33 <6.6.158 || >=6.8.12 <6.9 || >=6.9.3 <6.10 | b9661fd2423fc25e91e0517ecc0b6156ad83e3a8, 6b431b63219853eef4054e2f1cb073d2ca2059b4, abf734d150c61acfdfee102169d0e5d1c482e285, d5c4ee1fa4e83a12afc051c831936cd8e006cde3, c40ed3e884c8dc0350f26484030438ef24208ff1, 18a6fe05fb6e18de29fa90d388bb34044114b3d8, 6.1.189, 6.6.158, 6.9, 6.10 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
In the Linux kernel, the following vulnerability has been resolved: net: bridge: mst: move switchdev call outside rcu This is a follow-up of one of sashiko's pre-existing bug reports. br_mst_set_state() calls switchdev_port_attr_set() for nonzero MSTIs while holding rcu_read_lock() which invokes the blocking switchdev notifier chain and may sleep. Nonzero MSTI changes come from netlink with rtnl held. Move the switchdev call before entering the rcu section and assert that rtnl is held. The call cannot be deferred because netlink needs its error and extack. Also DSA reads the old bridge MST state during the callback and checks it. A deferred callback will be late and will see the updated state.
Quoted source text, attributed separately from HOL analysis.