CVE-2026-43341

In the Linux kernel, the following vulnerability has been resolved:

net/ipv6: ioam6: prevent schema length wraparound in trace fill

ioam6_fill_trace_data() stores the schema contribution to the trace

length in a u8. With bit 22 enabled and the largest schema payload,

sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the

remaining-space check. __ioam6_fill_trace_data() then positions the

write cursor without reserving the schema area but still copies the

4-byte schema header and the full schema payload, overrunning the trace

buffer.

Keep sclen in an unsigned int so the remaining-space check and the write

cursor calculation both see the full schema length.