{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-74523", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74523", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-15T12:27:40.575Z", "updatedAt": "2026-10-16T19:05:52.869Z", "importedAt": "2026-10-24T01:58:30.346Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "qede: sync udp_tunnel ports outside qede_lock in the recovery path", "summary": "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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "19e505ee8bb9e0f0355eda9e9f614fb25fed0070" }, { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "c4c1e5d6bc2b900b2328d6fff93dc8146b858d69" }, { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "8e1bdf57de91247e57816482966265ada573cc74" }, { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "e382a4efeeae6555b95d9ff336cf3094ee7d336b" }, { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "4626df3f63c9185efba5750fe76ac01ab3351bae" }, { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "e51becb8f3377a377171ed5bf0082b96e22e6292" }, { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27" }, { "version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87", "status": "affected", "versionType": "git", "lessThan": "451c9075d6c53f2438d110addbeeeea6fac18567" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.9" }, { "version": "5.10.265", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.216", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.183", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.151", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.103", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.44", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }