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CVE-2026-64408

HIGHCVSS 8.8/10EPSS 0.26%

Last modified

CVE-2026-64408 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: pin L2CAP connection during netdev registration bnep_add_connection() reads the L2CAP connection without holding the channel lock, then passes its HCI device to register_netdev(). Controller teardown can clear and release that connection concurrently, leaving the network device registration path to dereference a freed parent device. Take a reference to the L2CAP connection while holding the channel lock. Retain it until register_netdev() has taken the parent device reference.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: pin L2CAP connection during netdev registration bnep_add_connection() reads the L2CAP connection without holding the channel lock, then passes its HCI device to register_netdev(). Controller teardown can clear and release that connection concurrently, leaving the network device registration path to dereference a freed parent device. Take a reference to the L2CAP connection while holding the channel lock. Retain it until register_netdev() has taken the parent device reference.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.26%

17.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < 390b5db3ff8745187f094c4e915663b7b1f98944; >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < 46a88784c4c9b96954dd86f747ce93f65efa1302; >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < 551ae773ec64045b4e72099132654887e0270bcc; >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < ae215c5b6422d8eda443b861b124bd1be6969c31; >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < df22adc7eafc22e651561813c11dc51a796b12ee; >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < a6b22dbd80926556290ad2243be25218d6956a19; >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < 563a8573047182f550b1e1e030615755cd8c41da; >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b, < bb067a99a0356196c0b89a95721985485ebce5a5
LinuxLinux3.13

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-64408?
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: pin L2CAP connection during netdev registration bnep_add_connection() reads the L2CAP connection without holding the channel lock, then passes its HCI device to register_netdev(). Controller teardown can clear and release that connection concurrently, leaving the network device registration path to dereference a freed parent device. Take a reference to the L2CAP connection while holding the channel lock. Retain it until register_netdev() has taken the parent device reference.
How severe is CVE-2026-64408?
CVE-2026-64408 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.
How do I fix CVE-2026-64408?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST