CVE-2026-72049 (GCVE-0-2026-72049)
Vulnerability from cvelistv5
Published
2026-08-15 05:52
Modified
2026-08-17 05:39
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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).
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f Version: 3e9c156e2c210ab67b12b1b692983a6b97c19d3f |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/ieee802154/ieee802154.h",
"net/ieee802154/netlink.c"
],
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"versions": [
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]
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"net/ieee802154/netlink.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "3.16"
},
{
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"version": "0",
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},
{
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"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.12.97",
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{
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"status": "unaffected",
"version": "6.18.40",
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{
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"status": "unaffected",
"version": "7.1.5",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
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],
"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: admin-gate legacy LLSEC dump operations\n\nIn net/ieee802154/netlink.c, the legacy IEEE802154_NL family ops table\nbuilds the LLSEC dump entries (LLSEC_LIST_KEY, LLSEC_LIST_DEV,\nLLSEC_LIST_DEVKEY, LLSEC_LIST_SECLEVEL) with IEEE802154_DUMP() which\nsets no .flags, so generic netlink runs them ungated. The modern\nnl802154 family admin-gates the equivalent reads via\nNL802154_CMD_GET_SEC_KEY and friends with .flags = GENL_ADMIN_PERM.\n\nAny local uid that can open AF_NETLINK / NETLINK_GENERIC can resolve\nthe \"802.15.4 MAC\" family and dump LLSEC_LIST_KEY on any wpan netdev\nthat has an LLSEC key installed; the dump handler writes the raw\n16-byte AES-128 key bytes (IEEE802154_ATTR_LLSEC_KEY_BYTES, copied\nverbatim from struct ieee802154_llsec_key.key) into the reply.\nRecovering the AES key compromises 802.15.4 LLSEC link confidentiality\nand authenticity, since LLSEC uses CCM* and the same key authenticates\nand encrypts frames.\n\nImpact: any local uid with no capabilities can read the raw 16-byte\nAES-128 LLSEC key from the kernel keytable on any wpan netdev that has\nan administrator-installed LLSEC key, by issuing an LLSEC_LIST_KEY\ndump on the legacy IEEE802154_NL generic-netlink family.\n\nIntroduce IEEE802154_DUMP_PRIV() mirroring IEEE802154_DUMP() but\nsetting .flags = GENL_ADMIN_PERM, and use it for the four LLSEC dump\nentries. LIST_PHY and LIST_IFACE retain IEEE802154_DUMP() because the\nmodern nl802154 family exposes their equivalents to unprivileged\nreaders by design (NL802154_CMD_GET_WPAN_PHY and\nNL802154_CMD_GET_INTERFACE carry \"can be retrieved by unprivileged\nusers\" annotations)."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - Exploitation requires a local syscall path: open AF_NETLINK/NETLINK_GENERIC, resolve the \"802.15.4 MAC\" genl family, and send an NLM_F_DUMP for IEEE802154_LLSEC_LIST_KEY; the bug is in kernel netlink configuration code, not in remote 802.15.4 frame handling.\nAC:L - Once IEEE802154/LLSEC is enabled and keys are installed on a wpan netdev (typical on Zigbee/6LoWPAN gateways and industrial IoT coordinators), an attacker can deterministically trigger the dump and receive key material without races or special memory layout.\nPR:L - The vulnerable dump ops lack GENL_ADMIN_PERM, so netlink_capable(CAP_NET_ADMIN) is never enforced; any basic local UID with permission to create generic-netlink sockets (no capabilities) can read administrator-installed LLSEC keys.\nUI:N - No victim interaction is required beyond the attacker already having local execution access; exploitation is a direct netlink dump request with no user clicks, mounts, or device pairing steps.\nS:U - Impact stays within the host kernel/network stack security boundary (disclosure of kernel-held LLSEC credentials); it does not cross VM, container, or IOMMU isolation boundaries.\nC:H - The dump handler returns full raw 16-byte AES-128 LLSEC key bytes (IEEE802154_ATTR_LLSEC_KEY_BYTES) for every installed key, enabling decryption of all CCM*-protected 802.15.4 traffic protected by those keys.\nI:H - Disclosed AES-128 LLSEC keys are used for both encryption and authentication (CCM*); possession enables forging cryptographically valid LLSEC frames and impersonating trusted WPAN devices on Zigbee/6LoWPAN/industrial sensor networks.\nA:N - The bug is a read-only information disclosure via netlink attribute copying; it does not corrupt memory, panic the kernel, or cause hangs or denial of service."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:39:46.666Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/3465035ba18b1ed50f8d201897d14135d20532b0"
},
{
"url": "https://git.kernel.org/stable/c/dffe745760f38fac0b8288e0dc4759b23d9888ff"
},
{
"url": "https://git.kernel.org/stable/c/e84708ef7521f3bffc85a449954042018abbd60e"
},
{
"url": "https://git.kernel.org/stable/c/5abe94a205539d27945cda3ba43fdcfe295cf2c8"
},
{
"url": "https://git.kernel.org/stable/c/09fd25cd8cd80a6b3edef04e53a7324d06ac2180"
},
{
"url": "https://git.kernel.org/stable/c/1905ebabe638c946aced00c4bb664da26cac56d5"
},
{
"url": "https://git.kernel.org/stable/c/6383248058956f2a52d720b1e9f8921099cdae04"
},
{
"url": "https://git.kernel.org/stable/c/9c1e0b6d49471a712511d23fc9d06901561135e8"
}
],
"title": "ieee802154: admin-gate legacy LLSEC dump operations",
"x_generator": {
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}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72049",
"datePublished": "2026-08-15T05:52:06.989Z",
"dateReserved": "2026-08-09T03:40:39.902Z",
"dateUpdated": "2026-08-17T05:39:46.666Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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