{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74523", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.911Z", "datePublished": "2026-08-15T12:27:40.575Z", "dateUpdated": "2026-08-15T12:27:40.575Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T12:27:40.575Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/qlogic/qede/qede_main.c"], "versions": [{"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "lessThan": "e382a4efeeae6555b95d9ff336cf3094ee7d336b", "status": "affected", "versionType": "git"}, {"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "lessThan": "4626df3f63c9185efba5750fe76ac01ab3351bae", "status": "affected", "versionType": "git"}, {"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "lessThan": "e51becb8f3377a377171ed5bf0082b96e22e6292", "status": "affected", "versionType": "git"}, {"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "lessThan": "6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27", "status": "affected", "versionType": "git"}, {"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "lessThan": "451c9075d6c53f2438d110addbeeeea6fac18567", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/qlogic/qede/qede_main.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.6.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "7.2-rc6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e382a4efeeae6555b95d9ff336cf3094ee7d336b"}, {"url": "https://git.kernel.org/stable/c/4626df3f63c9185efba5750fe76ac01ab3351bae"}, {"url": "https://git.kernel.org/stable/c/e51becb8f3377a377171ed5bf0082b96e22e6292"}, {"url": "https://git.kernel.org/stable/c/6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27"}, {"url": "https://git.kernel.org/stable/c/451c9075d6c53f2438d110addbeeeea6fac18567"}], "title": "qede: sync udp_tunnel ports outside qede_lock in the recovery path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/qlogic/qede/qede_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e382a4efeeae6555b95d9ff336cf3094ee7d336b", "status": "affected", "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "versionType": "git"}, {"lessThan": "4626df3f63c9185efba5750fe76ac01ab3351bae", "status": "affected", "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "versionType": "git"}, {"lessThan": "e51becb8f3377a377171ed5bf0082b96e22e6292", "status": "affected", "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "versionType": "git"}, {"lessThan": "6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27", "status": "affected", "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "versionType": "git"}, {"lessThan": "451c9075d6c53f2438d110addbeeeea6fac18567", "status": "affected", "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/qlogic/qede/qede_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.9"}, {"lessThan": "5.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.151", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.103", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc6", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-74523", "lastModified": "2026-08-15T13:17:57.543", "metrics": {}, "published": "2026-08-15T13:17:57.543", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/451c9075d6c53f2438d110addbeeeea6fac18567"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4626df3f63c9185efba5750fe76ac01ab3351bae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e382a4efeeae6555b95d9ff336cf3094ee7d336b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e51becb8f3377a377171ed5bf0082b96e22e6292"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"created": "2026-08-15T16:15:03.531611+00:00", "updated": "2026-08-15T16:15:03.531618+00:00", "vendors": [], "weaknesses": ["CWE-362"]}