Out-of-bounds Write Affecting kernel-tools-debuginfo package, versions <1:6.1.168-202.320.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.07% (22nd percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELTOOLSDEBUGINFO-16736945
  • published18 May 2026
  • disclosed8 May 2026

Introduced: 8 May 2026

NewCVE-2026-43341  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-tools-debuginfo to version 1:6.1.168-202.320.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1681.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-debuginfo package and not the kernel-tools-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1