Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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.