{"id":"CVE-2026-74523","revision":"c68b2af799eb48f3bc979de6d19b1d8f","records":[{"revision":"c68b2af799eb48f3bc979de6d19b1d8f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74523","aliases":[],"title":"qede: sync udp_tunnel ports outside qede_lock in the recovery path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nqede: sync udp_tunnel ports outside qede_lock in the recovery path\n\nA TX timeout on a qede NIC that has VXLAN/GENEVE tunnel ports\nconfigured wedges the rtnetlink control plane of the whole machine:\n\n  NETDEV WATCHDOG: ens6f1 (qede): transmit queue 2 timed out 10226 ms\n  [qede_tx_timeout:586(ens6f1)]TX timeout on queue 2!\n  [qede_recovery_handler:2665(ens6f0)]Starting a recovery process\n\nThe recovery path deadlocks on the driver's own mutex:\n\n  qede_sp_task\n   rtnl_lock()\n   mutex_lock(&edev->qede_lock)        <- taken\n   qede_recovery_handler\n    qede_load\n    udp_tunnel_nic_reset_ntf\n     __udp_tunnel_nic_device_sync\n      info->sync_table == qede_udp_tunnel_sync\n       mutex_lock(&edev->qede_lock)    <- same task: deadlock\n\nThe mutex is not recursive, so the kworker blocks on itself with\nrtnl_lock held, and neither lock is ever released. Every task that\ncalls rtnl_lock() afterwards (ip, ovs-vswitchd, lldpad, IPv6\naddrconf, sshd) blocks forever while the node still answers ping.\nIn a vmcore from an affected production node rtnl_mutex.owner\ndecodes to the very kworker blocked at the innermost mutex_lock()\nabove.\n\nRe-sync the tunnel ports from qede_sp_task() after the internal lock\nis dropped, still under rtnl_lock as the udp_tunnel API requires.\nThis mirrors qede_open(), which calls udp_tunnel_nic_reset_ntf()\nunder rtnl without the internal lock.\n\nqede_recovery_handler() now returns whether it has successfully\nreloaded an open device, and the caller re-syncs the ports only in\nthat case. This keeps the old gating exactly: a device that was down\nor a failed recovery returns false, as those paths never reached the\nudp_tunnel_nic_reset_ntf() call before either.\n\nThis was the only user of the qede_lock()/qede_unlock() helpers, so\nremove them.","state":0,"publishedAt":"2026-08-15T12:27:40.575+00:00","modifiedAt":"2026-10-16T19:05:52.869+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ethernet/qlogic/qede/qede_main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"19e505ee8bb9e0f0355eda9e9f614fb25fed0070\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"c4c1e5d6bc2b900b2328d6fff93dc8146b858d69\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"8e1bdf57de91247e57816482966265ada573cc74\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"e382a4efeeae6555b95d9ff336cf3094ee7d336b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"4626df3f63c9185efba5750fe76ac01ab3351bae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"e51becb8f3377a377171ed5bf0082b96e22e6292\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8cd160a29415f1789d473b1dc07fcc9d02a02b87\",\n                            \"lessThan\": \"451c9075d6c53f2438d110addbeeeea6fac18567\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ethernet/qlogic/qede/qede_main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.151\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/19e505ee8bb9e0f0355eda9e9f614fb25fed0070","https://git.kernel.org/stable/c/c4c1e5d6bc2b900b2328d6fff93dc8146b858d69","https://git.kernel.org/stable/c/8e1bdf57de91247e57816482966265ada573cc74","https://git.kernel.org/stable/c/e382a4efeeae6555b95d9ff336cf3094ee7d336b","https://git.kernel.org/stable/c/4626df3f63c9185efba5750fe76ac01ab3351bae","https://git.kernel.org/stable/c/e51becb8f3377a377171ed5bf0082b96e22e6292","https://git.kernel.org/stable/c/6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27","https://git.kernel.org/stable/c/451c9075d6c53f2438d110addbeeeea6fac18567"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74523","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74523","identifiers":["CVE-2026-74523"]},"retained":false,"historicalAffected":[]}],"coverage":[]}