What’s Vulnerable › Vulnerabilities

CVE-2026-98018: net: mctp: i3c: serialize probe with bus removal

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: net: mctp: i3c: serialize probe with bus removal mctp_i3c_probe() drops busdevs_lock after finding the matching bus. A concurrent I3C_NOTIFY_BUS_REMOVE can then unregister and free the bus netdev before probe passes its private data to mctp_i3c_add_device(). The latter consequently adds a list node through a freed mbus pointer. Keep busdevs_lock held until the device has been added. This also satisfies the __must_hold annotation on mctp_i3c_add_device().

Affected products

• Linux kernel: 6.7 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2b4707a149a55e8fa75c9ef32b359d60f470a566
• https://git.kernel.org/stable/c/765c5e357e67916a7aac8ead4ac2fa7d2bffe000
• https://git.kernel.org/stable/c/906d8dbafabfa81a30e3ade420cb9912f223a5e1
• https://git.kernel.org/stable/c/e6541b2747682fdb2c6ded4a7cf7c39c4067a35c

Get alerted when CVE-2026-98018 or the next vulnerability affects your stack