CVE-2026-64452

Kernel compromise via unlocked NHC descriptor dereference

Published Jul 25, 2026 · Updated Jul 25, 2026

Use-after-free in the Linux Kernel 6LoWPAN decompressor allows physically proximate attackers to compromise the kernel via crafted frames. lowpan_nhc_do_uncompression() unlocks lowpan_nhc_lock before logging nhc->name, allowing concurrent descriptor removal to free the referenced object. The unpaired Bluetooth path is exposed, but exploitation requires a victim-side NHC module unload during the narrow race window and can disclose kernel memory, corrupt kernel state, or panic the host.

CVSS severity7.1
High
EPSS probability0.22%
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 Linux Kernel 6LoWPAN decompressor allows physically proximate attackers to compromise the kernel via crafted frames. lowpan_nhc_do_uncompression() unlocks lowpan_nhc_lock before logging nhc->name, allowing concurrent descriptor removal to free the referenced object. The unpaired Bluetooth path is exposed, but exploitation requires a victim-side NHC module unload during the narrow race window and can disclose kernel memory, corrupt kernel state, or panic the host.

The record

CVE
CVE-2026-64452
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=4.1
  2. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <0beccbcf50de125be5520d0ffc59af4bb8655482
  3. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <1720db928e5a58ca7d75ac1d514c3b73fd7061a7
  4. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <593b78bb3c7ef0c6e9ae6fdf5afa80a5f7573168
  5. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <80b5c8779acee0550845394fb3e5176a398aa24c
  6. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <9c2f5c0829a8c8b904dae36be6d8056b719ac605
  7. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <a8e3a94711134e898c6021a6b77374efa91b3639
  8. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <b713aa0cc344f10f7a9928a230b5f5e780d04078
  9. Affected versionversion=92aa7c65d295f3cbb96904afe335f683e55584b8 <cc27aea4d454abfb385ee2c9499c78b96db9b728

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.1; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <0beccbcf50de125be5520d0ffc59af4bb8655482; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <1720db928e5a58ca7d75ac1d514c3b73fd7061a7; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <593b78bb3c7ef0c6e9ae6fdf5afa80a5f7573168; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <80b5c8779acee0550845394fb3e5176a398aa24c; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <9c2f5c0829a8c8b904dae36be6d8056b719ac605; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <a8e3a94711134e898c6021a6b77374efa91b3639; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <b713aa0cc344f10f7a9928a230b5f5e780d04078; version=92aa7c65d295f3cbb96904afe335f683e55584b8 <cc27aea4d454abfb385ee2c9499c78b96db9b728

Published CVSS scores

7.1Linux CNACVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

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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