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CVE-2026-72049

ieee802154: admin-gate legacy LLSEC dump operations

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).

Timeline

  1. ID reserved

    By Linux

  2. · 6 days later

    Published

  3. · 2 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-72049, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVDNVD · Received3.1High7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS (exploitation in 30 days)
0.14% · top 96% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Affected products

  • Linux · Linux

    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < 3465035ba18b1ed50f8d201897d14135d20532b0
    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < dffe745760f38fac0b8288e0dc4759b23d9888ff
    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < e84708ef7521f3bffc85a449954042018abbd60e
    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < 5abe94a205539d27945cda3ba43fdcfe295cf2c8
    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < 09fd25cd8cd80a6b3edef04e53a7324d06ac2180
    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < 1905ebabe638c946aced00c4bb664da26cac56d5
    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < 6383248058956f2a52d720b1e9f8921099cdae04
    • affected 3e9c156e2c210ab67b12b1b692983a6b97c19d3f – < 9c1e0b6d49471a712511d23fc9d06901561135e8
  • Linux · Linux

    • affected 3.16
    • unaffected < 3.16
    • unaffected 5.10.261 – ≤ 5.10.*
    • unaffected 5.15.212 – ≤ 5.15.*
    • unaffected 6.1.178 – ≤ 6.1.*
    • unaffected 6.6.145 – ≤ 6.6.*
    • unaffected 6.12.97 – ≤ 6.12.*
    • unaffected 6.18.40 – ≤ 6.18.*
    • unaffected 7.1.5 – ≤ 7.1.*
    • unaffected 7.2 – ≤ *

References

References8

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .