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CVE-2026-64270

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, <39b12daf1adb80f9595fdfe584961deb80860cbb, 6.18.39, 5.15.217, 0, <=7.1.*, 7.1.4, <040843281eebfa110d08fd7fb083fe6cb55cea14, <f3d5e77b27fded71dcb97f409262bf0abba0410e, <5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6, 07b8481d4aff73d6f451f25e74ea10240ff5131e, <3.6, <8301c335305344d4da4ab9442b6a399dacfe5b8d, <=5.10.*, <=6.6.*, 3.6, <d99ba93c35ff2d5276e9c2632967481bd53a79d0, 5.10.266, <=6.18.*, 6.1.184, 6.6.145, <=*, <=5.15.*, <b78150729762d47c14fe29a2582bdca5568e62b8, 6.12.96, 7.2, <66725039f7090afe14c31bd259e2059a68f04023

Description

In the Linux kernel, the following vulnerability has been resolved: Input: mms114 - reject an oversized device packet size mms114_interrupt() reads a packet of touch data from the device into a fixed-size on-stack buffer struct mms114_touch touch[MMS114_MAX_TOUCH]; which holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes, i.e. 80 bytes. The length of the I2C read into it is taken verbatim from the device: packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); if (packet_size <= 0) goto out; ... error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size, (u8 *)touch); packet_size is a single device register byte (0x0F) and the only check is the lower bound packet_size <= 0; it is never bounded against the size of touch[]. A malfunctioning, malicious or counterfeit controller (or an attacker tampering with the I2C bus) can report a packet_size of up to 255, so __mms114_read_reg() writes up to 175 bytes past the end of touch[] on the IRQ-thread stack: a stack out-of-bounds write that can overwrite the stack canary, saved registers and the return address. A well-formed device never reports more than the buffer holds, so reject an oversized packet and drop the report, consistent with the handler's other error paths, rather than reading past the buffer.

Gravité et risque d'exploitation

CVE-2026-64270 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 0.17 %, ce qui la place devant 5.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <39b12daf1adb80f9595fdfe584961deb80860cbb, 6.18.39, 5.15.217, 0, <=7.1.*, 7.1.4, <040843281eebfa110d08fd7fb083fe6cb55cea14, <f3d5e77b27fded71dcb97f409262bf0abba0410e, <5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6, 07b8481d4aff73d6f451f25e74ea10240ff5131e, <3.6, <8301c335305344d4da4ab9442b6a399dacfe5b8d, <=5.10.*, <=6.6.*, 3.6, <d99ba93c35ff2d5276e9c2632967481bd53a79d0, 5.10.266, <=6.18.*, 6.1.184, 6.6.145, <=*, <=5.15.*, <b78150729762d47c14fe29a2582bdca5568e62b8, 6.12.96, 7.2, <66725039f7090afe14c31bd259e2059a68f04023) 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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