CVE-2026-74480

CVE CVE-2026-74480EUVD EUVD-2026-59673Published 2026-08-15T12:27:13.000ZLast changed 2026-08-19T16:37:33.000ZCVSS 9.8

What the advisory describes

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.

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: 5.15.216; patch: 5.10.265; 6db6f0eae6052b70885562e1733896647ec1d807 <0309ebbc570000ea0df11c06b69798e5860c5f6f; 4.11; 6db6f0eae6052b70885562e1733896647ec1d807 <d6c32e2e25a9a06ba021030e26b6d602a277eb72; patch: 6.1.183; 6db6f0eae6052b70885562e1733896647ec1d807 <1a109cc9890d017c41d77e6c82da739579c49f0b; patch: 0; 6db6f0eae6052b70885562e1733896647ec1d807 <482bcb85139addb4e8ac8ed10baeda3e0aad4031; patch: 6.6.151; patch: 7.1.8; patch: 6.12.103; 6db6f0eae6052b70885562e1733896647ec1d807 <a39789f211b8a4125f0c70e05b30cf715f4f187d; patch: 6.18.44; patch: 7.2; 6db6f0eae6052b70885562e1733896647ec1d807 <4c57056ca6aace2e9f94ae9298bf49ef6b0c95e4; 6db6f0eae6052b70885562e1733896647ec1d807 <4695430e8132420bf8de94da3eb36a6cf35fde6b; 6db6f0eae6052b70885562e1733896647ec1d807 <159ad90cb929c033308bb39a2c5f8fbf393b77aa

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

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Linux — Linux

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