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CVE-2026-98347

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : 4.7.7, <=6.1.*, <=6.12.*, <3.13, b81459c78935e4579a577b2366c5f8878d3c7fee, <3.11, 0, 3.12.65, <9a141d3dc869d18b2eab35e999f4790a9b84e40f, 8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5, <3.3, 6.12.112, <326f7d34bd7e64de535566b65c0533b640df5a81, 5.10.271, 6.6.158, 749fd55dd210f9676f0d445a6efaaa3bec65174a, <=5.10.*, <=6.6.*, dfe809702a11bd7fb91c882fb55620e39ce22109, <b72f38929f4b5aa83161fd3b22a7327207e51ec5, 6.1.189, <5ad925d45f28464a5e043c9620880bb6a030da89, <4.5, 3.2.84, 87160fb51bc343793cc8f5f031a87f1a35aecb82, 7.2.8, a289c65ca49d2680a3d797e633e57a45573d1df2, <1b11e4b55b41d9e69a8e8d07622614202e2eaca9, <=6.18.*, 5.15.222, 4.4.24, <=7.2.*, 3.16.39, 344bacca8cd811809fc33a249f2738ab757d327f, 4.8, <=*, <1ff3add37c329704ec46181b4ae4f00f9f16ce6f, <f973769fb7cb33ba0d4a64b7dcfee0cabaead938, <=5.15.*, <3.17, <4.8, 6.18.54, <188b334a6db36a8e0bfaaf59bc4020639a0f3aad, 3.10.105, 7.3

Description

In the Linux kernel, the following vulnerability has been resolved: IB/IPoIB: Avoid restoring OPER_UP after multicast flush ipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to prevent multicast joins while ipoib_mcast_dev_flush() is running, and restores the flag afterwards if it was previously set. This restore races with ipoib_ib_dev_down(). If the interface is brought down while the flush is in progress, ipoib_ib_dev_down() clears IPOIB_FLAG_OPER_UP, but the flush path may set it again after the device has already gone down. Since commit 894021a75291 ("IB/ipoib: Make the carrier_on_task race aware"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP being cleared to terminate its rtnl_trylock() retry loop. If the flag is left set after shutdown, the workqueue retries forever, causing teardown to deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while holding RTNL. Instead of overloading IPOIB_FLAG_OPER_UP to block multicast joins during a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag. Use it together with IPOIB_FLAG_OPER_UP to determine whether multicast joins are allowed, avoiding the race with device shutdown.

Gravité et risque d'exploitation

CVE-2026-98347 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.18 %, ce qui la place devant 7.5 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 4.7.7, <=6.1.*, <=6.12.*, <3.13, b81459c78935e4579a577b2366c5f8878d3c7fee, <3.11, 0, 3.12.65, <9a141d3dc869d18b2eab35e999f4790a9b84e40f, 8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5, <3.3, 6.12.112, <326f7d34bd7e64de535566b65c0533b640df5a81, 5.10.271, 6.6.158, 749fd55dd210f9676f0d445a6efaaa3bec65174a, <=5.10.*, <=6.6.*, dfe809702a11bd7fb91c882fb55620e39ce22109, <b72f38929f4b5aa83161fd3b22a7327207e51ec5, 6.1.189, <5ad925d45f28464a5e043c9620880bb6a030da89, <4.5, 3.2.84, 87160fb51bc343793cc8f5f031a87f1a35aecb82, 7.2.8, a289c65ca49d2680a3d797e633e57a45573d1df2, <1b11e4b55b41d9e69a8e8d07622614202e2eaca9, <=6.18.*, 5.15.222, 4.4.24, <=7.2.*, 3.16.39, 344bacca8cd811809fc33a249f2738ab757d327f, 4.8, <=*, <1ff3add37c329704ec46181b4ae4f00f9f16ce6f, <f973769fb7cb33ba0d4a64b7dcfee0cabaead938, <=5.15.*, <3.17, <4.8, 6.18.54, <188b334a6db36a8e0bfaaf59bc4020639a0f3aad, 3.10.105, 7.3) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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