{"apiVersion":"1.0","identifier":"CVE-2026-74480","description":"In the Linux kernel, the following vulnerability has been resolved: net: bridge: stop fast-leave after deleting a port group br_multicast_leave_group() iterates mp->ports with pp = &p->next in its fast-leave path. After br_multicast_del_pg() removes p, continuing the loop advances pp through the deleted entry. If multicast-to-unicast was enabled, the bridge can hold multiple port groups for the same port and group with different source MAC addresses. Once multicast-to-unicast is disabled, br_port_group_equal() matches those entries by port only. A fast leave can then delete one entry and continue from its stale next pointer, leaving mp->ports pointing at a deleted port group. Fast leave only needs to remove one matching port group. Break after br_multicast_del_pg() so the loop stops before dereferencing the removed entry.","publishedAt":"2026-08-15T13:17:52","lastModifiedAt":"2026-08-19T17:21:05","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74480","cvssScore":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.0056,"riskScore":1.03,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74480","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74480","en":"https://www.redsauce.net/en/cves/CVE-2026-74480","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74480","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74480","de":"https://www.redsauce.net/de/cves/CVE-2026-74480","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74480","el":"https://www.redsauce.net/el/cves/CVE-2026-74480"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74480"}}