CVE-2026-43341

CRITICAL EPSS 32.7%
Published May 8, 20261mo ago · Modified Jun 19, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 19, 2026 1w ago

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 Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
32.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <6.1.168
linuxlinux_kernel*≥6.2  –  <6.6.134
linuxlinux_kernel*≥6.7  –  <6.12.81
linuxlinux_kernel*≥6.13  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2
  • git.kernel.org https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596
    Patch