CVE-2026-89503
Gravedad CVSS v3.1:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
11/09/2026
Última modificación:
03/10/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
ring-buffer: Fix subbuf resize race with ring_buffer_alloc_read_page()<br />
<br />
ring_buffer_alloc_read_page() is racy with ring_buffer_subbuf_order_set,<br />
it can allocate a reader page with an outdated order. This isn&#39;t a big<br />
issue, the user can still re-allocate a new reader page and try again.<br />
<br />
However, what is more problematic is if the value of subbuf_order<br />
changes in the middle of ring_buffer_alloc_read_page(). In that case,<br />
bpage->order might not match the actual allocated memory.<br />
<br />
Use bpage->order for the allocation to prevent this race.
Impacto
Puntuación base 3.x
7.80
Gravedad 3.x
ALTA