CVE-2026-80763

Out-of-bounds read via truncated Bluetooth response

Published Sep 4, 2026 · Updated Sep 4, 2026

Out-of-bounds read in Linux kernel Bluetooth HCI event handling allows attackers to read past an skb via a truncated controller response. hci_cc_le_set_cig_params() trusts num_handles after only the fixed response portion is validated, then reads each advertised trailing handle without checking the remaining skb length. Reachability requires malformed LE Set CIG Parameters data from a Bluetooth controller; public sources do not establish exposure of the excess data or a resulting crash.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux kernel Bluetooth HCI event handling allows attackers to read past an skb via a truncated controller response. hci_cc_le_set_cig_params() trusts num_handles after only the fixed response portion is validated, then reads each advertised trailing handle without checking the remaining skb length. Reachability requires malformed LE Set CIG Parameters data from a Bluetooth controller; public sources do not establish exposure of the excess data or a resulting crash.

The record

CVE
CVE-2026-80763
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=26afbd826ee326e63a334c37fd45e82e50a615ec <0acd4eeb4b225b9bebbf9ef96cc10cdd79b94899
  2. Affected versionversion=26afbd826ee326e63a334c37fd45e82e50a615ec <26741d178f31932c9018b36b7953e6dc391436a4
  3. Affected versionversion=26afbd826ee326e63a334c37fd45e82e50a615ec <6fc540e835dddb518cef3ff522b780f701cd03df
  4. Affected versionversion=26afbd826ee326e63a334c37fd45e82e50a615ec <9e05783d0bb96a7b853cc058a7c7de2dc4a62154
  5. Affected versionversion=26afbd826ee326e63a334c37fd45e82e50a615ec <a34df5c4a439cfc04565fa5be608ed1e53134f1f
  6. Affected versionversion=26afbd826ee326e63a334c37fd45e82e50a615ec <d83ecb7b96105d932dabaa56ccd7418c25fb7cbb
  7. Affected versionversion=26afbd826ee326e63a334c37fd45e82e50a615ec <e3f82e8f2a5915f533b57a065e9a045aa2ee03bc
  8. Affected versionversion=6.0

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=26afbd826ee326e63a334c37fd45e82e50a615ec <0acd4eeb4b225b9bebbf9ef96cc10cdd79b94899; version=26afbd826ee326e63a334c37fd45e82e50a615ec <26741d178f31932c9018b36b7953e6dc391436a4; version=26afbd826ee326e63a334c37fd45e82e50a615ec <6fc540e835dddb518cef3ff522b780f701cd03df; version=26afbd826ee326e63a334c37fd45e82e50a615ec <9e05783d0bb96a7b853cc058a7c7de2dc4a62154; version=26afbd826ee326e63a334c37fd45e82e50a615ec <a34df5c4a439cfc04565fa5be608ed1e53134f1f; version=26afbd826ee326e63a334c37fd45e82e50a615ec <d83ecb7b96105d932dabaa56ccd7418c25fb7cbb; version=26afbd826ee326e63a334c37fd45e82e50a615ec <e3f82e8f2a5915f533b57a065e9a045aa2ee03bc; version=6.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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