CVE-2026-64046
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: prevent chain-after-chain in plain text SG<br />
<br />
Sashiko points out that if end = 0 (start != 0) the current<br />
code will create a chain link to content type right after<br />
the wrap link:<br />
<br />
This would create a chain where the wrap link points directly<br />
to another chain link. The scatterlist API sg_next iterator<br />
does not recursively resolve consecutive chain links.<br />
<br />
meaning this is illegal input to crypto.<br />
<br />
The wrapping link is unnecessary if end = 0. end is the entry after<br />
the last one used so end = 0 means there&#39;s nothing pushed after<br />
the wrap:<br />
<br />
end start i<br />
v v v<br />
[ ]...[ ][ d ][ d ][ d ][ d ][rsv for wrap]<br />
<br />
Skip the wrapping in this case.<br />
<br />
TLS 1.3 can use the "wrapping slot" for it&#39;s chaining if end = 0.<br />
This avoids the chain-after-chain.<br />
<br />
Move the wrap chaining before marking END and chaining off content<br />
type, that feels like more logical ordering to me, but should not<br />
matter from functional perspective.
Impacto
Puntuación base 3.x
9.80
Gravedad 3.x
CRÍTICA
Referencias a soluciones, herramientas e información
- https://git.kernel.org/stable/c/410351158dfef2d67fea6603680b3a6013c6ed9d
- https://git.kernel.org/stable/c/49a5faaa471ddcd37b6893970c9916eb836e7c31
- https://git.kernel.org/stable/c/91359966e247c0244c66d50bbb8e74aefa4321c3
- https://git.kernel.org/stable/c/929b1548e63ac72e104c07d8ee8cbbeeba2fa89a
- https://git.kernel.org/stable/c/acdc12b71c9aa4be5dcd2c8062753c6d2033e235
- https://git.kernel.org/stable/c/af855f4c966afafef74faf8390c7b86568c0d46d
- https://git.kernel.org/stable/c/b9c015ef1a7bf1e8dc67f21c6381f36deb2c3a36
- https://git.kernel.org/stable/c/ff26a0e8377dec07e4a7230db7675bed1b9a6d03



