What’s Vulnerable › Vulnerabilities

CVE-2026-43241: ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-06-17
• Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS, This patch protects against invalid index out of bounds access to mw_sizes When invalid access print message to user that configuration is not valid.

Affected products

• Linux kernel: from 4.15 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16 — fixed in 5.10.252, 5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.252, 5.15.202, 6.1.165, 6.12.75. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0e930420945106151c6eb3d7837b4e6154e9b144
• https://git.kernel.org/stable/c/2346856b74823a2a78109002e479a3d02526a9ce
• https://git.kernel.org/stable/c/348e1ac9ad983ed7e62de14e1daf47f1695a4ce9
• https://git.kernel.org/stable/c/47ce292dd45dc689747c40603222691638919189
• https://git.kernel.org/stable/c/740945de896021b9a859e71f38f6aea72a6393cf
• https://git.kernel.org/stable/c/85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92
• https://git.kernel.org/stable/c/c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface
• https://git.kernel.org/stable/c/ee02c4f980c91820845dd8e469ec7dc670ab6d9d

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