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CVE-2026-90092

Vulnérabilité élevée dans Linux (Linux)

CVSS 8.0 · Élevée
EPSS 0.4%
Linux•Linux•Versions : <6.6.157, <5.11, 7.0.7, <87276dc15b559d32757a43b4415c8445fbae06c4, <=6.1.*, <=6.12.*, 0, 6.1.188, <2a3a27aaf19bf069720e024ce6fde54e6bf80df9, 1b1c0da227bf63479bac9982fc8d12df9aaea0fb, <7.1, 1810e42ff6716f320c7269d5850eca48b07b7427, 6.18.52, <bf61a65c6093970e3b50031c4b79ebf3bd411eba, <491e4c60017969b053888029998d2a61f298986a, 6.12.88, 5.15.209, <=6.6.*, 6.1.175, 85426e97dc72f2088ba6d27e74cd58c3fbd43e31, <d4bfa78fd67929b62b02013c107973e0c5b7aa9a, 6.6.157, 7.2.6, <5.16, 7.1, <=6.18.*, 5105f3e6b2df619c635b5f6a49fac131a36c7952, 6.12.110, 5.10.258, c88c185ae0a1067823661b220aeea613df2c127b, <6.12.110, <=7.2.*, 2ff1a41a912de8517b4482e946dd951b7d80edbf, <6.18.52, <=*, 6.6.140, 0c17c8832562b2aac288e89cefd0f46074f54bcb, <c47339e169bf4a0a4cfabb91351471f67744c2bc, 6.18.30, <6.1.188, a2dcf1a61d056aef15b63c6eae9441344d624389, 7.3

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: reject accept queue add unless BT_LISTEN New sk should not be added to parent socket accept queue after last l2cap_sock_cleanup_listen() has run in l2cap_sock_teardown_cb() and state set to BT_CLOSED, as that can result to UAF on dereferencing the dangling parent reference. l2cap_sock_new_connection_cb() may race with parent l2cap_chan teardown, due to chan->state accessed without consistent locking: [Task 1] [Task 2] l2cap_sock_release(parent) l2cap_connect l2cap_sock_shutdown pchan = l2cap_global_chan_by_psm l2cap_chan_lock(pchan) l2cap_chan_close l2cap_sock_teardown_cb pchan->state = BT_CLOSED l2cap_chan_unlock(pchan) ------> l2cap_chan_lock(pchan) l2cap_new_connection l2cap_sock_new_connection_cb l2cap_chan_lock(pchan) <-------- l2cap_chan_unlock(pchan) l2cap_sock_kill(parent) /* bt_sk(sk)->parent dangling */ Fix by adding check for sk_state == BT_LISTEN after acquiring sk lock in l2cap_sock_new_connection_cb(). Add lock_sock() around sk_state writes where missing, to avoid data races. Although the data races on pchan->state should be fixed too, this defensive sk_state check probably makes sense in any case.

Gravité et risque d'exploitation

CVE-2026-90092 obtient un score CVSS de 8.0/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.35 %, ce qui la place devant 27.4 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <6.6.157, <5.11, 7.0.7, <87276dc15b559d32757a43b4415c8445fbae06c4, <=6.1.*, <=6.12.*, 0, 6.1.188, <2a3a27aaf19bf069720e024ce6fde54e6bf80df9, 1b1c0da227bf63479bac9982fc8d12df9aaea0fb, <7.1, 1810e42ff6716f320c7269d5850eca48b07b7427, 6.18.52, <bf61a65c6093970e3b50031c4b79ebf3bd411eba, <491e4c60017969b053888029998d2a61f298986a, 6.12.88, 5.15.209, <=6.6.*, 6.1.175, 85426e97dc72f2088ba6d27e74cd58c3fbd43e31, <d4bfa78fd67929b62b02013c107973e0c5b7aa9a, 6.6.157, 7.2.6, <5.16, 7.1, <=6.18.*, 5105f3e6b2df619c635b5f6a49fac131a36c7952, 6.12.110, 5.10.258, c88c185ae0a1067823661b220aeea613df2c127b, <6.12.110, <=7.2.*, 2ff1a41a912de8517b4482e946dd951b7d80edbf, <6.18.52, <=*, 6.6.140, 0c17c8832562b2aac288e89cefd0f46074f54bcb, <c47339e169bf4a0a4cfabb91351471f67744c2bc, 6.18.30, <6.1.188, a2dcf1a61d056aef15b63c6eae9441344d624389, 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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