CVE-2026-43341

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-43341

Key Details

CVE	CVE-2026-43341
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-43341
CVE	https://www.cve.org/CVERecord?id=CVE-2026-43341

Source

Reference

NVD

CVE