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CVE-2026-80802

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : 7.2.1, 6.1.185, <=6.1.*, 7.1.11, <=6.12.*, 6.12.106, 0, 5.10.267, <=7.1.*, 6.6.154, <0d723090645b82c1cb27cfd7ebf81f0e7c96bcae, <7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1, 4.4, <fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463, <d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee, <db7e464b350969c6ea8340de00d9796e5fd5123b, <=5.10.*, <=6.6.*, a06347c04c13e380afce0c9816df51f00b83faf1, <e5eec121f2c3bc4c7022613bedd9121a8aa4c949, <8d2c243b79854628ff076c38748c020042f02f57, <=6.18.*, <1aa3fc769b0c45bd19f8dab1697084c2b3f6d706, 6.18.47, 7.3, <=7.2.*, <1fc32327b927a6e2cde086f82575c29880844228, <=*, <=5.15.*, 5.15.218, <4.4

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: fdp: bound the device-reported read length and fix an skb leak fdp_nci_i2c_read() takes the next packet length from two device-supplied bytes and never validates it. The value is a u16 used as the i2c_master_recv() count into a 261-byte on-stack buffer: a malicious, counterfeit or malfunctioning controller (or an i2c bus interposer) can drive it far past the buffer for a stack out-of-bounds write that clobbers the canary and return address, or below the minimum frame size (directly, or by truncating the computed sum) so the header/LRC strip and the next length read run past a short receive. Reject a length outside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a corrupted packet already is, and force resynchronization. The same loop allocates one data skb per iteration and assumes a length packet followed by a data packet; a device that sends two data packets in one call leaks the first skb when the second allocation overwrites it. Free a previously allocated skb before allocating the next.

Gravité et risque d'exploitation

CVE-2026-80802 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 0.24 %, ce qui la place devant 14.5 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 7.2.1, 6.1.185, <=6.1.*, 7.1.11, <=6.12.*, 6.12.106, 0, 5.10.267, <=7.1.*, 6.6.154, <0d723090645b82c1cb27cfd7ebf81f0e7c96bcae, <7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1, 4.4, <fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463, <d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee, <db7e464b350969c6ea8340de00d9796e5fd5123b, <=5.10.*, <=6.6.*, a06347c04c13e380afce0c9816df51f00b83faf1, <e5eec121f2c3bc4c7022613bedd9121a8aa4c949, <8d2c243b79854628ff076c38748c020042f02f57, <=6.18.*, <1aa3fc769b0c45bd19f8dab1697084c2b3f6d706, 6.18.47, 7.3, <=7.2.*, <1fc32327b927a6e2cde086f82575c29880844228, <=*, <=5.15.*, 5.15.218, <4.4) 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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