CVE-2026-43341

Advisory lineage Upstream: 0 Downstream: 19
Analyzed
Published: 08 May 2026, 13:37
Last modified:19 Jun 2026, 11:58

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (cve.org)
EPSS Score
0.41% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

08 May 2026, 13:37
Published
Vulnerability first disclosed
19 Jun 2026, 11:58
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.41%• Percentile: 33%

Affected Systems

  • linux•linux

    ≥ 8c6f6fa6772696be0c047a711858084b38763728, < d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2 | ≥ 8c6f6fa6772696be0c047a711858084b38763728, < e96d48b37708d53cbdc47f6f60b0714fc4a5f596 | ≥ 8c6f6fa6772696be0c047a711858084b38763728, < d1b041080086e91d3733a5438a8c51ad5d3d8e09 | ≥ 8c6f6fa6772696be0c047a711858084b38763728, < 77695a69baca9b99d95fad09fc78c2318736604f | ≥ 8c6f6fa6772696be0c047a711858084b38763728, < 184d2e9db27c0f76226b5cad16fe29510a5d2280 | ≥ 8c6f6fa6772696be0c047a711858084b38763728, < d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d | ≥ 8c6f6fa6772696be0c047a711858084b38763728, < 5e67ba9bb531e1ec6599a82a065dea9040b9ce50 | 5.15

  • linux•linux kernel

    ≥ 5.15, < 6.1.168 | ≥ 6.2, < 6.6.134 | ≥ 6.7, < 6.12.81 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7

References (7)