CVE-2026-43341 (GCVE-0-2026-43341)
Vulnerability from cvelistv5
Published
2026-05-08 13:37
Modified
2026-10-19 19:16
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8c6f6fa6772696be0c047a711858084b38763728
Version: 8c6f6fa6772696be0c047a711858084b38763728
Version: 8c6f6fa6772696be0c047a711858084b38763728
Version: 8c6f6fa6772696be0c047a711858084b38763728
Version: 8c6f6fa6772696be0c047a711858084b38763728
Version: 8c6f6fa6772696be0c047a711858084b38763728
Version: 8c6f6fa6772696be0c047a711858084b38763728
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