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CVE-2026-80783

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : 7.2.1, <=6.1.*, 7.1.11, <=6.12.*, 2.6.37, 6.6.156, <2.6.37, <bec338b07beb883726b32192c8f01c601bc76fda, 0, <70589b0c005db003f6d8ae4db3c4d54fed7b83e4, <=7.1.*, a462230e16acc8664145216da3c928d03556691a, <a33a596d3ad8dfe6c96a368097a028abeee16c17, <=6.6.*, <d16df755b4493b6d37803c628b2c621d096796a8, <=6.18.*, <d095de37f78c5f32a4252ef0f99b84ba76550b86, <=7.2.*, <db8d634128d2ba88d79c0b601e983ebe14bb0519, <8a10a624996f16628234306b46f0cf36707d78bd, 5.15.220, 6.18.49, <=*, <=5.15.*, 6.12.108, <26c45abed62536aabf4033fb6d64cf72e93374e9, 6.1.187, 7.3

Description

In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event() magicmouse_raw_event() handles DOUBLE_REPORT_ID (0xf7) packets, which pack two touch reports into one, by splitting the packet and calling itself on each half. The only guard against runaway recursion is a "size < 1" check, which stops zero-sized calls but does not bound the recursion depth. A malicious HID device that matches this driver can send a report starting with DOUBLE_REPORT_ID and filled with the sequence [0xf7, 0x00]. Each level consumes two bytes and recurses on the remainder, so an incoming report of up to HID_MAX_BUFFER_SIZE (16 KiB) drives roughly 8000 nested calls. That easily exhausts the 16 KiB kernel stack, leading to a stack overflow: a panic with CONFIG_VMAP_STACK, or memory corruption without it. A double report only ever wraps two normal reports; it is never legitimately nested. Refuse to re-enter the DOUBLE_REPORT_ID case from a recursive call so the recursion depth is bounded to two, while all valid packets keep being parsed exactly as before.

Gravité et risque d'exploitation

CVE-2026-80783 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 0.19 %, ce qui la place devant 8.6 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 7.2.1, <=6.1.*, 7.1.11, <=6.12.*, 2.6.37, 6.6.156, <2.6.37, <bec338b07beb883726b32192c8f01c601bc76fda, 0, <70589b0c005db003f6d8ae4db3c4d54fed7b83e4, <=7.1.*, a462230e16acc8664145216da3c928d03556691a, <a33a596d3ad8dfe6c96a368097a028abeee16c17, <=6.6.*, <d16df755b4493b6d37803c628b2c621d096796a8, <=6.18.*, <d095de37f78c5f32a4252ef0f99b84ba76550b86, <=7.2.*, <db8d634128d2ba88d79c0b601e983ebe14bb0519, <8a10a624996f16628234306b46f0cf36707d78bd, 5.15.220, 6.18.49, <=*, <=5.15.*, 6.12.108, <26c45abed62536aabf4033fb6d64cf72e93374e9, 6.1.187, 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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