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CVE-2026-99015

Bluetooth: hci_sock: Serialize dead-device detachment

Products / packages Linux

Published

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Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:05:32 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

21 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

f2f856b65ac4b77049c76c0e89ecd3a177e9fcd1 → before 88f47e66b1a6e0bfc350676937f3b552b434e74c

git versions

e04480920d1eec9c061841399aa6f35b6f987d8b → before 304adbdb96b0491c2b377e216b0bf417fc8e69a9

git versions

e04480920d1eec9c061841399aa6f35b6f987d8b → before 362126f739889436048f5573ebc87466d2525fd9

git versions

e04480920d1eec9c061841399aa6f35b6f987d8b → before 37cef0c8fb537f40600910d2c2e5f2d5509305f3

git versions

e04480920d1eec9c061841399aa6f35b6f987d8b → before 76f2e2665697340ac719e7ff1bf148dd014e55c1

git versions

e04480920d1eec9c061841399aa6f35b6f987d8b → before c3d2799877906d0c8392d96e14216cd82b020330

git versions

e04480920d1eec9c061841399aa6f35b6f987d8b → before e660a22402944f2615a16fde7129a3c497537329

git versions

e04480920d1eec9c061841399aa6f35b6f987d8b → before 381a0925c556a8d91a80a9b9e3e86651d60ffee3

git versions

d6ef8bb00aa65eceb413fc165a55086459863e38

git versions

0e77f979a97d3d517fad0b51249ba6fb8ae2d365

git versions

0782c8c7f80c9dd457acdfe16fd0f339f0e73093

git versions

3719acc161d5c1ce09912cc1c9eddc2c5faa3c66

git versions

ff29fe26ab8679bc13a3f0bf5b2911535a1cfc35

git versions

75dd00b755ebfa9b24eaedc9f42e9adfc00ae00c

git versions

5.10.58 → before 5.10.273

semver versions

4.4.281 → before 4.5

semver versions

4.9.280 → before 4.10

semver versions

4.14.244 → before 4.15

semver versions

4.19.203 → before 4.20

semver versions

5.4.140 → before 5.5

semver versions

5.13.10 → before 5.14

semver versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

5.14

unaffected

0 → before 5.14

semver versions

5.10.273 → through 5.10.*

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.160 → through 6.6.*

semver versions

6.12.113 → through 6.12.*

semver versions

6.18.57 → through 6.18.*

semver versions

7.2.11 → through 7.2.*

semver versions

7.3 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sock: Serialize dead-device detachment

Rebinding an HCI socket after its controller is unregistered can race monitor control replay and crash the kernel. hci_sock_bind() clears hci_pi(sk)->hdev and drops the device reference under only the socket lock, whereas send_monitor_control_replay() holds hci_sk_list.lock for reading.

Replay can observe a non-NULL hdev, then bind can clear it and drop the last reference before create_monitor_ctrl_open() reads hdev->id. This can cause a NULL pointer dereference if the pointer is reloaded, or a use-after-free if the old pointer is retained.

The kernel reported:

KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] RIP: 0010:create_monitor_ctrl_open+0x579/0x800 Call Trace: hci_sock_bind+0xd96/0x1190 __sys_bind+0x166/0x200 __x64_sys_bind+0x6d/0xb0 do_syscall_64+0xdd/0x4a0 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The same missing serialization lets hci_send_to_sock() select a socket for the old device and queue its frame after bind has detached the socket or installed a new binding.

Take hci_sk_list.lock for writing when clearing the device pointer and resetting the socket state. This waits for existing replay and delivery readers to finish before detachment and prevents later readers from using the old binding. Keep hci_dev_put() outside the critical section because the final device release can sleep.

References

8 sources
git.kernel.org/stable/c/88f47e66b1a6e0bfc350676937f3b552b434e74c
Source referenceLinux
git.kernel.org/stable/c/304adbdb96b0491c2b377e216b0bf417fc8e69a9
Source referenceLinux
git.kernel.org/stable/c/362126f739889436048f5573ebc87466d2525fd9
Source referenceLinux
git.kernel.org/stable/c/37cef0c8fb537f40600910d2c2e5f2d5509305f3
Source referenceLinux
git.kernel.org/stable/c/76f2e2665697340ac719e7ff1bf148dd014e55c1
Source referenceLinux
git.kernel.org/stable/c/c3d2799877906d0c8392d96e14216cd82b020330
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/e660a22402944f2615a16fde7129a3c497537329
Source referenceLinux
git.kernel.org/stable/c/381a0925c556a8d91a80a9b9e3e86651d60ffee3
Source referenceLinux

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification · not supplied
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-99015

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10.58

Before: 5.10.273

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.14

Before: 5.15.224

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.14

Before: 6.1.191

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.14

Before: 6.6.160

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.14

Before: 6.12.113

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.14

Before: 6.18.57

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.14

Before: 7.2.11

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.14

Before: 7.3

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 4.4.281

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 4.9.280

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 4.14.244

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 4.19.203

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.4.140

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.13.10

Applicability preview
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            "vulnerable": true,
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            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.9.280"
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            "versionStartIncluding": "4.14.244"
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            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "5.13.10"
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]
Contributing organizations · 1
Linux

Assigning organization

2026-10-30

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.