CVE-2026-80763

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: validate LE Set CIG Parameters response The Command Complete dispatch validates only the fixed part of the LE Set CIG Parameters response. After that part is pulled from the skb, hci_cc_le_set_cig_params() trusts num_handles and reads each entry in the trailing handle array. Matching num_handles against the command's num_cis does not guarantee that the response contains the advertised handles. A truncated response from a malfunctioning controller can therefore make the handler read beyond the skb data. Validate that the remaining skb data contains all advertised handles. Include this in the existing response validation so malformed responses also follow the established CIG failure handling.

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EPSS — Exploit Prediction

0.0017

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/0acd4eeb4b225b9bebbf9ef96cc10cdd79b94899 https://git.kernel.org/stable/c/26741d178f31932c9018b36b7953e6dc391436a4 https://git.kernel.org/stable/c/6fc540e835dddb518cef3ff522b780f701cd03df https://git.kernel.org/stable/c/9e05783d0bb96a7b853cc058a7c7de2dc4a62154 https://git.kernel.org/stable/c/a34df5c4a439cfc04565fa5be608ed1e53134f1f https://git.kernel.org/stable/c/d83ecb7b96105d932dabaa56ccd7418c25fb7cbb https://git.kernel.org/stable/c/e3f82e8f2a5915f533b57a065e9a045aa2ee03bc

Frequently Asked Questions

What is CVE-2026-80763? +

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: validate LE Set CIG Parameters response The Command Complete dispatch validates only the fixed part of the LE Set CIG Parameters response. After that part is pulled from the skb, hci_cc_le_set_cig_params() trusts num_handles and reads each entry in the trailing handle array. Matching num_handles against the command's num_cis does not guarantee that the response contains the advertised handles. A truncated response from a malfunctioning controller can therefore make the handler read beyond the skb data. Validate that the remaining skb data contains all advertised handles. Include this in the existing response validation so malformed responses also follow the established CIG failure handling.

How do I check if I'm vulnerable to CVE-2026-80763? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.