CVE-2026-43341
Gravedad CVSS v3.1:
CRÍTICA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
08/05/2026
Última modificación:
12/05/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
net/ipv6: ioam6: prevent schema length wraparound in trace fill<br />
<br />
ioam6_fill_trace_data() stores the schema contribution to the trace<br />
length in a u8. With bit 22 enabled and the largest schema payload,<br />
sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the<br />
remaining-space check. __ioam6_fill_trace_data() then positions the<br />
write cursor without reserving the schema area but still copies the<br />
4-byte schema header and the full schema payload, overrunning the trace<br />
buffer.<br />
<br />
Keep sclen in an unsigned int so the remaining-space check and the write<br />
cursor calculation both see the full schema length.
Impacto
Puntuación base 3.x
9.80
Gravedad 3.x
CRÍTICA
Referencias a soluciones, herramientas e información
- https://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280
- https://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50
- https://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f
- https://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09
- https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d
- https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596



