What’s Vulnerable › Vulnerabilities

CVE-2026-43457: mctp: i2c: fix skb memory leak in receive path

• Severity: medium (CVSS 5.5 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: 2026-05-08 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: mctp: i2c: fix skb memory leak in receive path When 'midev->allow_rx' is false, the newly allocated skb isn't consumed by netif_rx(), it needs to free the skb directly.

Affected products

• Linux kernel: from 5.18 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 7.0-rc1, 7.0-rc2, 7.0-rc3 — fixed in 6.1.167, 6.12.78, 6.18.19, 6.19.9, 6.6.130

How to fix

Upgrade to a fixed version: Linux kernel 6.1.167, 6.12.78, 6.18.19, 6.19.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0fb2adbdd5c03e8c9ebcdc48afd414b2724c85eb
• https://git.kernel.org/stable/c/1b1be322342a6b0085bf6ee52235e5ac9834ec25
• https://git.kernel.org/stable/c/1ec54187e1aa40a4cfa2b265e9a311179f24b98d
• https://git.kernel.org/stable/c/9f81be2ab9d8e4744871bfb3e868ef413413829f
• https://git.kernel.org/stable/c/d7900a43b0a314a645ca0a2adf45928dbc7001f4
• https://git.kernel.org/stable/c/e3f5e0f22cfc2371e7471c9fd5b4da78f9df7c69

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