CVE-2026-99031net: bridge: avoid recursive multicast port cleanup
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net: bridge: avoid recursive multicast port cleanup br_multicast_sg_del_exclude_ports() removes automatically added STAR_EXCL port groups by calling br_multicast_del_pg(). For S,G entries, that deletion calls back into br_multicast_sg_del_exclude_ports(), so a large number of STAR_EXCL ports consumes one kernel stack frame per port and can hit the stack guard page. Keep the complete port-group deletion path for cleanup, but suppress the S,G exclude-port cleanup while that helper is already walking the same entry. Normal deletion callers retain the existing behavior.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 23, 2026
- First seen by InfoSec Signals
- Oct 23, 2026
Affected products
Linux Linux linux:linux (from the name) | 8266a0491e92d39dc9af739e8380a0daa9b8836b builds before 695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64; 8266a0491e92d39dc9af739e8380a0daa9b8836b builds before 2fb87c6025f90191516bee3ce14b42eb3e1cfed7; from 8266a0491e92d39dc9af739e8380a0daa9b8836b before d109141ba14652146089ef78b32d5e4d5285ebad; 8266a0491e92d39dc9af739e8380a0daa9b8836b builds before 7931fb9181421953f3133b408b0f2e2b8dd68b61; from 8266a0491e92d39dc9af739e8380a0daa9b8836b before 5158353121bae4f552cb677ce8c5c3ef52f93a0d | CNA record |
References
- https://git.kernel.org/stable/c/695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64
- https://git.kernel.org/stable/c/2fb87c6025f90191516bee3ce14b42eb3e1cfed7
- https://git.kernel.org/stable/c/d109141ba14652146089ef78b32d5e4d5285ebad
- https://git.kernel.org/stable/c/7931fb9181421953f3133b408b0f2e2b8dd68b61
- https://git.kernel.org/stable/c/5158353121bae4f552cb677ce8c5c3ef52f93a0d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.