CVE-2026-43098
Gravedad:
Pendiente de análisis
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
06/05/2026
Última modificación:
06/05/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
nfc: s3fwrn5: allocate rx skb before consuming bytes<br />
<br />
s3fwrn82_uart_read() reports the number of accepted bytes to the serdev<br />
core. The current code consumes bytes into recv_skb and may already<br />
deliver a complete frame before allocating a fresh receive buffer.<br />
<br />
If that alloc_skb() fails, the callback returns 0 even though it has<br />
already consumed bytes, and it leaves recv_skb as NULL for the next<br />
receive callback. That breaks the receive_buf() accounting contract and<br />
can also lead to a NULL dereference on the next skb_put_u8().<br />
<br />
Allocate the receive skb lazily before consuming the next byte instead.<br />
If allocation fails, return the number of bytes already accepted.
Impacto
Referencias a soluciones, herramientas e información
- https://git.kernel.org/stable/c/09822d3d6f68a0cdc4626e0c507324a4927f55a9
- https://git.kernel.org/stable/c/5c14a19d5b1645cce1cb1252833d70b23635b632
- https://git.kernel.org/stable/c/6d931680a9851481c3243689488eafed08eeff71
- https://git.kernel.org/stable/c/7c31f7a599cf00fad3c204092a91a924126c67e4
- https://git.kernel.org/stable/c/d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156



