CVE-2026-80914

Freed-memory dereference via listener-close race

Published Sep 9, 2026 · Updated Sep 10, 2026

Use-after-free in the Bluetooth ISO subsystem of Linux allows attackers to dereference freed kernel memory through a socket race. The iso_conn_ready function links a child socket to a BIS listener without rechecking whether concurrent close has made that parent dead, leaving a dangling pointer for iso_chan_del. Triggering requires the listener to close between lookup and locking and a later child disconnect; the published record does not establish the resulting system impact.

CVSS severityUnavailable
Unscored
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Bluetooth ISO subsystem of Linux allows attackers to dereference freed kernel memory through a socket race. The iso_conn_ready function links a child socket to a BIS listener without rechecking whether concurrent close has made that parent dead, leaving a dangling pointer for iso_chan_del. Triggering requires the listener to close between lookup and locking and a later child disconnect; the published record does not establish the resulting system impact.

The record

CVE
CVE-2026-80914
Published
Sep 9, 2026
Updated
Sep 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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=6.0
  2. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <03288b7447c9e572f8ab82fc29cfb4ca719ab210
  3. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <2387cd06a2c0b416f05028b02bba1089f54c28d9
  4. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <49fd7116f76b860b230843700fb7423ab5331e1f
  5. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <560bef609fa5992745929e8d7d458b9d88dd2830

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <03288b7447c9e572f8ab82fc29cfb4ca719ab210; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <2387cd06a2c0b416f05028b02bba1089f54c28d9; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <49fd7116f76b860b230843700fb7423ab5331e1f; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <560bef609fa5992745929e8d7d458b9d88dd2830

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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

See the directory against your own environment.

Your stack

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