CVE-2026-72049

Local LLSEC key disclosure via ungated netlink dumps

Published Aug 15, 2026 · Updated Aug 15, 2026

Information disclosure in the Linux kernel allows local users to read IEEE 802.15.4 LLSEC AES keys through generic netlink. The legacy net/ieee802154/netlink.c LLSEC dump operations omit GENL_ADMIN_PERM, causing LLSEC_LIST_KEY to copy raw 16-byte keys into unprivileged replies. Any local uid can exploit the flaw when a wpan interface has an administrator-installed LLSEC key, compromising protected frame confidentiality and authenticity.

CVSS severity7.1
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Linux kernel allows local users to read IEEE 802.15.4 LLSEC AES keys through generic netlink. The legacy net/ieee802154/netlink.c LLSEC dump operations omit GENL_ADMIN_PERM, causing LLSEC_LIST_KEY to copy raw 16-byte keys into unprivileged replies. Any local uid can exploit the flaw when a wpan interface has an administrator-installed LLSEC key, compromising protected frame confidentiality and authenticity.

The record

CVE
CVE-2026-72049
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=3.16
  2. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <09fd25cd8cd80a6b3edef04e53a7324d06ac2180
  3. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <1905ebabe638c946aced00c4bb664da26cac56d5
  4. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <3465035ba18b1ed50f8d201897d14135d20532b0
  5. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <5abe94a205539d27945cda3ba43fdcfe295cf2c8
  6. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <6383248058956f2a52d720b1e9f8921099cdae04
  7. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <9c1e0b6d49471a712511d23fc9d06901561135e8
  8. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <dffe745760f38fac0b8288e0dc4759b23d9888ff
  9. Affected versionversion=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <e84708ef7521f3bffc85a449954042018abbd60e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.16; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <09fd25cd8cd80a6b3edef04e53a7324d06ac2180; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <1905ebabe638c946aced00c4bb664da26cac56d5; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <3465035ba18b1ed50f8d201897d14135d20532b0; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <5abe94a205539d27945cda3ba43fdcfe295cf2c8; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <6383248058956f2a52d720b1e9f8921099cdae04; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <9c1e0b6d49471a712511d23fc9d06901561135e8; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <dffe745760f38fac0b8288e0dc4759b23d9888ff; version=3e9c156e2c210ab67b12b1b692983a6b97c19d3f <e84708ef7521f3bffc85a449954042018abbd60e

Published CVSS scores

7.1Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.0OracleCVSS:3.1/AV:L/AC:H/PR:L/UI:N/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)
Vectorlocal
Privilegesauthenticated
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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