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CVE-2026-31552

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.5 · Élevée
EPSS 0.7%
Linux•Linux•Versions : <=6.1.*, 6.6.124, 745a0810dbc96a0471e5f5e627ba1e978c3116d4, <=6.12.*, <6.19, 6.12.78, cd89a4656c03f8db0c57350aaec69cd3cfaa3522, 6.12.70, <12f9eef39e49716c763714bfda835a733d5f6dea, <ceb46b40b021d21911ff8608ce4ed33c1264ad2f, <f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c, 0, <5.15.203, 7.0, 6.18.10, <6.12.78, 71de0b6e04bbee5575caf9a1e4d424e7dcc50018, <5.10.253, <6.6.130, <=5.10.*, <=6.6.*, <=6.19.*, 6.1.163, 5.15.203, <6.18.20, <deb353d9bb009638b7762cae2d0b6e8fdbb41a69, <=6.18.*, 689a7980e4788e13e766763d53569fb78dea2513, b167312390fdd461c81ead516f2b0b44e83a9edb, <46c670ff1ff466e5eccb3940f726586473dc053c, <6.1.167, 6.1.167, 5.10.250, <=*, 5.10.253, <=5.15.*, 6.19, 88295a55fefe5414e64293638b6f7549646e58ed, e75665dd096819b1184087ba5718bd93beafff51, 6.19.10, <cfa64e2b3717be1da7c4c1aff7268a009e8c1610, <980f793645540ca7a6318165cc12f49d5febeb99, <a6dc74209462c4fe5a88718d2f3a5286886081c8, 6.6.130, 6.18.20, 5.15.200

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom Since upstream commit e75665dd0968 ("wifi: wlcore: ensure skb headroom before skb_push"), wl1271_tx_allocate() and with it wl1271_prepare_tx_frame() returns -EAGAIN if pskb_expand_head() fails. However, in wlcore_tx_work_locked(), a return value of -EAGAIN from wl1271_prepare_tx_frame() is interpreted as the aggregation buffer being full. This causes the code to flush the buffer, put the skb back at the head of the queue, and immediately retry the same skb in a tight while loop. Because wlcore_tx_work_locked() holds wl->mutex, and the retry happens immediately with GFP_ATOMIC, this will result in an infinite loop and a CPU soft lockup. Return -ENOMEM instead so the packet is dropped and the loop terminates. The problem was found by an experimental code review agent based on gemini-3.1-pro while reviewing backports into v6.18.y.

Gravité et risque d'exploitation

CVE-2026-31552 obtient un score CVSS de 7.5/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.72 %, ce qui la place devant 52.9 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 6.6.124, 745a0810dbc96a0471e5f5e627ba1e978c3116d4, <=6.12.*, <6.19, 6.12.78, cd89a4656c03f8db0c57350aaec69cd3cfaa3522, 6.12.70, <12f9eef39e49716c763714bfda835a733d5f6dea, <ceb46b40b021d21911ff8608ce4ed33c1264ad2f, <f2c06d718a7b85cbc59ceaa2ff3f46b178ac709c, 0, <5.15.203, 7.0, 6.18.10, <6.12.78, 71de0b6e04bbee5575caf9a1e4d424e7dcc50018, <5.10.253, <6.6.130, <=5.10.*, <=6.6.*, <=6.19.*, 6.1.163, 5.15.203, <6.18.20, <deb353d9bb009638b7762cae2d0b6e8fdbb41a69, <=6.18.*, 689a7980e4788e13e766763d53569fb78dea2513, b167312390fdd461c81ead516f2b0b44e83a9edb, <46c670ff1ff466e5eccb3940f726586473dc053c, <6.1.167, 6.1.167, 5.10.250, <=*, 5.10.253, <=5.15.*, 6.19, 88295a55fefe5414e64293638b6f7549646e58ed, e75665dd096819b1184087ba5718bd93beafff51, 6.19.10, <cfa64e2b3717be1da7c4c1aff7268a009e8c1610, <980f793645540ca7a6318165cc12f49d5febeb99, <a6dc74209462c4fe5a88718d2f3a5286886081c8, 6.6.130, 6.18.20, 5.15.200) 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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