CVE-2026-64047
Gravedad CVSS v3.1:
CRÍTICA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
19/07/2026
Última modificación:
20/07/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring<br />
<br />
When an sk_msg scatterlist ring wraps (sg.end sg.start],<br />
MAX_SKB_FRAGS - msg_pl->sg.start + 1,<br />
msg_pl->sg.data);<br />
<br />
This places the chain pointer at<br />
<br />
sg_chain(data[start], (MAX_SKB_FRAGS - msg_start + 1) .. =<br />
&data[start] + (MAX_SKB_FRAGS - msg_start + 1) - 1 =<br />
data[start + (MAX_SKB_FRAGS - start + 1) - 1] =<br />
data[MAX_SKB_FRAGS]<br />
<br />
instead of the true last entry. This is likely due to a "race" of<br />
the commit under Fixes landing close to<br />
commit 031097d9e079 ("bpf: sk_msg, zap ingress queue on psock down")<br />
<br />
Convert to ARRAY_SIZE and drop the data[start] / - start (as suggested<br />
by Sabrina).
Impacto
Puntuación base 3.x
9.80
Gravedad 3.x
CRÍTICA
Referencias a soluciones, herramientas e información
- https://git.kernel.org/stable/c/131ef12057d92b77b636321b7849c69222405a97
- https://git.kernel.org/stable/c/285943c6e7ca309bbea84b253745154241d9788a
- https://git.kernel.org/stable/c/2fb0dc7e0099686c4e9d2732745d8a31b18c3628
- https://git.kernel.org/stable/c/47110c3a9ac247b688657337f5981efcfcb240dc
- https://git.kernel.org/stable/c/66339b71f105e6f83e0da3b9583d95077534fe1d
- https://git.kernel.org/stable/c/73963a375885d5ccb7def39fd0b4f542e0f343dd
- https://git.kernel.org/stable/c/84158c2997159df4a0d70cd9c46774512d32a522
- https://git.kernel.org/stable/c/eca989eab4b2599dcb02f72140a7c08f08838520



