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CVE-2026-64571

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, 6.12.101, <7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7, 0, <88f7044f92b8326fbfab26d0d8ed297c367ebb76, <=7.1.*, 2.6.28, <ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea, 5.15.216, <=5.10.*, <=6.6.*, <d38f5d868a0a4770e3bcd0925e16c46acdbc9509, <f21b7e096fe5371bf697cd410537fb434a763f5e, 7cb770729ba895f73253dfcd46c3fcba45d896f9, 6.18.42, <f46f8f9c43fd02f4dd5f716d4bda296a523c04f0, 7.1.6, <2.6.28, 6.1.183, <25c3b85af3fc4f8043159b14e65790fc3bbdaf48, <=6.18.*, <9096e1f7014174067239a63df18ae5f28301990d, <=*, <=5.15.*, 5.10.265, 6.6.148, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: p54: validate RX frame length in p54_rx_eeprom_readback() p54_rx_eeprom_readback() copies the requested EEPROM slice out of a device-supplied readback frame without checking that the skb actually holds that many bytes. Commit da1b9a55ff11 ("wifi: p54: prevent buffer-overflow in p54_rx_eeprom_readback()") closed the destination overflow by copying a fixed priv->eeprom_slice_size (and rejecting a mismatched advertised len), but the source side is still unbounded: nothing verifies the frame is long enough to supply that many bytes. A malicious USB device can send a short frame whose advertised len matches priv->eeprom_slice_size while the payload is truncated. The equality check passes and memcpy() reads past the end of the skb, leaking adjacent heap: BUG: KASAN: slab-out-of-bounds in p54_rx (drivers/net/wireless/intersil/p54/txrx.c:507) Read of size 1016 at addr ffff88800f077114 by task swapper/0/0 Call Trace: <IRQ> ... __asan_memcpy (mm/kasan/shadow.c:105) p54_rx (drivers/net/wireless/intersil/p54/txrx.c:507) p54u_rx_cb (drivers/net/wireless/intersil/p54/p54usb.c:163) __usb_hcd_giveback_urb (drivers/usb/core/hcd.c:1657) dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:2005) ... </IRQ> The buggy address belongs to the object at ffff88800f0770c0 which belongs to the cache skbuff_small_head of size 704 The buggy address is located 84 bytes inside of allocated 704-byte region [ffff88800f0770c0, ffff88800f077380) Check that the slice fits in the skb before copying.

Gravité et risque d'exploitation

CVE-2026-64571 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 6.0 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, 6.12.101, <7a456ffcd20bd92ad0ef46c1aaa0e39e3be1f7e7, 0, <88f7044f92b8326fbfab26d0d8ed297c367ebb76, <=7.1.*, 2.6.28, <ebd6d37fa94bee929e0b4c9ca19fdf9b1dcf6cea, 5.15.216, <=5.10.*, <=6.6.*, <d38f5d868a0a4770e3bcd0925e16c46acdbc9509, <f21b7e096fe5371bf697cd410537fb434a763f5e, 7cb770729ba895f73253dfcd46c3fcba45d896f9, 6.18.42, <f46f8f9c43fd02f4dd5f716d4bda296a523c04f0, 7.1.6, <2.6.28, 6.1.183, <25c3b85af3fc4f8043159b14e65790fc3bbdaf48, <=6.18.*, <9096e1f7014174067239a63df18ae5f28301990d, <=*, <=5.15.*, 5.10.265, 6.6.148, 7.2) 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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