298 lines
17 KiB
JSON
298 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-74523",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-15T05:44:03.911Z",
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"datePublished": "2026-08-15T12:27:40.575Z",
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"dateUpdated": "2026-10-16T19:05:52.869Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-19T16:38:27.388Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The bug is reached from the qede NIC firmware error-recovery path triggered by network-driven faults (e.g., TX queue watchdog timeout on traffic-bearing queues); remote packets to an internet-facing qede host can induce recovery without local syscall access.\nAC:L - Once qede recovery runs on an interface with VXLAN/GENEVE ports registered, the nested qede_lock while rtnl_lock is held deadlocks deterministically; attackers can repeatedly apply traffic/load patterns to provoke TX timeout and firmware ERROR_RECOVERY.\nPR:N - Exploitation requires only the ability to send network traffic that provokes NIC recovery on a target that already has VXLAN/GENEVE offloads configured (normal on cloud/DC qede nodes); no attacker privileges or rtnetlink configuration are needed.\nUI:N - No victim interaction is required beyond routine use of a server whose qede uplink already runs overlay networking; the attacker does not need the victim to mount, open, or approve anything at exploit time.\nS:U - Impact is a kernel networking control-plane deadlock within the same host/kernel trust boundary; it does not cross VM, container, or IOMMU security domains to affect other authorities.\nC:N - This is a locking deadlock with no memory corruption, out-of-bounds access, use-after-free, or information disclosure; only mutex/RTNL state is wedged.\nI:N - The flaw does not modify data or achieve code execution; it only blocks threads waiting on rtnl_lock/qede_lock without altering memory contents or kernel objects beyond stalled lock state.\nA:H - The deadlock holds rtnl_lock indefinitely, freezing system-wide network reconfiguration and management (ip, ovs-vswitchd, sshd addr setup) until reboot; per CVSS guidance, kernel deadlocks that deny critical availability are rated High."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/qlogic/qede/qede_main.c"
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],
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"versions": [
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{
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"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
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"lessThan": "19e505ee8bb9e0f0355eda9e9f614fb25fed0070",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
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"lessThan": "c4c1e5d6bc2b900b2328d6fff93dc8146b858d69",
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"status": "affected",
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},
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{
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"status": "affected",
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"lessThan": "e382a4efeeae6555b95d9ff336cf3094ee7d336b",
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"status": "affected",
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},
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{
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"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
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"lessThan": "4626df3f63c9185efba5750fe76ac01ab3351bae",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
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"lessThan": "e51becb8f3377a377171ed5bf0082b96e22e6292",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
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"lessThan": "6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
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"lessThan": "451c9075d6c53f2438d110addbeeeea6fac18567",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/qlogic/qede/qede_main.c"
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],
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"versions": [
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{
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"version": "5.9",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.9",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.265",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.151",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.103",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.44",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/19e505ee8bb9e0f0355eda9e9f614fb25fed0070"
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},
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{
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"url": "https://git.kernel.org/stable/c/c4c1e5d6bc2b900b2328d6fff93dc8146b858d69"
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},
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{
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"url": "https://git.kernel.org/stable/c/8e1bdf57de91247e57816482966265ada573cc74"
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},
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{
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"url": "https://git.kernel.org/stable/c/e382a4efeeae6555b95d9ff336cf3094ee7d336b"
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},
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{
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"url": "https://git.kernel.org/stable/c/4626df3f63c9185efba5750fe76ac01ab3351bae"
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},
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{
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"url": "https://git.kernel.org/stable/c/e51becb8f3377a377171ed5bf0082b96e22e6292"
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{
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"url": "https://git.kernel.org/stable/c/6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27"
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},
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{
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"url": "https://git.kernel.org/stable/c/451c9075d6c53f2438d110addbeeeea6fac18567"
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}
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],
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"title": "qede: sync udp_tunnel ports outside qede_lock in the recovery path",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-74523",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:59:07.418597Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T19:05:52.869Z"
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}
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}
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]
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}
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} |