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CVE-2026-74523: Linux

7.5

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: qede: sync udp_tunnel ports outside qede_lock in the recovery path A TX timeout on a qede NIC that has VXLAN/GENEVE tunnel ports configured wedges the rtnetlink control plane of the whole machine: NETDEV WATCHDOG: ens6f1 (qede): transmit queue 2 timed out 10226 ms [qede_tx_timeout:586(ens6f1)]TX timeout on queue 2! [qede_recovery_handler:2665(ens6f0)]Starting a recovery process The recovery path deadlocks on the driver's own mutex: qede_sp_task rtnl_lock() mutex_lock(&edev->qede_lock) <- taken qede_recovery_handler qede_load udp_tunnel_nic_reset_ntf __udp_tunnel_nic_device_sync info->sync_table == qede_udp_tunnel_sync mutex_lock(&edev->qede_lock) <- same task: deadlock The mutex is not recursive, so the kworker blocks on itself with rtnl_lock held, and neither lock is ever released. Every task that calls rtnl_lock() afterwards (ip, ovs-vswitchd, lldpad, IPv6 addrconf, sshd) blocks forever while the node still answers ping. In a vmcore from an affected production node rtnl_mutex.owner decodes to the very kworker blocked at the innermost mutex_lock() above. Re-sync the tunnel ports from qede_sp_task() after the internal lock is dropped, still under rtnl_lock as the udp_tunnel API requires. This mirrors qede_open(), which calls udp_tunnel_nic_reset_ntf() under rtnl without the internal lock. qede_recovery_handler() now returns whether it has successfully reloaded an open device, and the caller re-syncs the ports only in that case. This keeps the old gating exactly: a device that was down or a failed recovery returns false, as those paths never reached the udp_tunnel_nic_reset_ntf() call before either. This was the only user of the qede_lock()/qede_unlock() helpers, so remove them.

Засегнати продукти

  • Linux Linux: 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди 19e505ee8bb9e0f0355eda9e9f614fb25fed0070; 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди c4c1e5d6bc2b900b2328d6fff93dc8146b858d69; 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди 8e1bdf57de91247e57816482966265ada573cc74; 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди e382a4efeeae6555b95d9ff336cf3094ee7d336b; 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди 4626df3f63c9185efba5750fe76ac01ab3351bae; 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди e51becb8f3377a377171ed5bf0082b96e22e6292; 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди 6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27; 8cd160a29415f1789d473b1dc07fcc9d02a02b87 преди 451c9075d6c53f2438d110addbeeeea6fac18567
  • Linux Linux: 5.9; преди 5.9; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.151 до 6.6.*; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74523: Linux | freedomonline.bg