CVE-2026-68125 (GCVE-0-2026-68125)
Vulnerability from cvelistv5
Published
2026-08-10 11:58
Modified
2026-08-19 16:29
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
mac802154: llsec: reject frames shorter than the authentication tag
llsec_do_decrypt_auth() computes the associated-data length for the
AEAD request as
assoclen += datalen - authlen;
where datalen is the number of bytes after the MAC header and authlen
(4, 8 or 16) is the length of the authentication tag. Nothing verifies
that the frame actually carries at least authlen payload bytes. A
secured frame whose payload is shorter than the tag makes
datalen - authlen negative; assoclen is then passed to
aead_request_set_ad() as an unsigned value close to 4 GiB, so
crypto_aead_decrypt() walks far off the end of the scatterlist that
only spans the real frame.
The frame is fully attacker-controlled and reaches this path from any
IEEE 802.15.4 peer in radio range. Reject frames whose payload is
shorter than the authentication tag before the subtraction.
Dynamically reproduced on a KASAN kernel as a general-protection-fault
in the AEAD scatterwalk, and the fix confirmed.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af Version: 4c14a2fb5d143e4ed94143be2b8c1961b47df9af |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/mac802154/llsec.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "f27ce82eb04960465df71634b196a48a4ecafd50",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
},
{
"lessThan": "2d6b42a61373144298070668fddf06efe79cf2ff",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
},
{
"lessThan": "ec7e62d77193131227df49d654d118fdf5a59892",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
},
{
"lessThan": "5bbf0cd9b6a7076af86c75e87e180099be2e11ae",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
},
{
"lessThan": "de80808f37d99c6dc67bb6f97eea00c8f57a8821",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
},
{
"lessThan": "f20dedce0429b293d4bad604e0d3f65d8ac96c83",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
},
{
"lessThan": "e09e0301d616c1ef38a5e64e8e4326fd39df13cc",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
},
{
"lessThan": "fd3a3f28ed60c6af4b2a39933b151d6b27842c3b",
"status": "affected",
"version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/mac802154/llsec.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.16"
},
{
"lessThan": "3.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.265",
"versionStartIncluding": "3.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "3.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "3.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "3.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "3.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "3.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "3.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "3.16",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmac802154: llsec: reject frames shorter than the authentication tag\n\nllsec_do_decrypt_auth() computes the associated-data length for the\nAEAD request as\n\n\tassoclen += datalen - authlen;\n\nwhere datalen is the number of bytes after the MAC header and authlen\n(4, 8 or 16) is the length of the authentication tag. Nothing verifies\nthat the frame actually carries at least authlen payload bytes. A\nsecured frame whose payload is shorter than the tag makes\ndatalen - authlen negative; assoclen is then passed to\naead_request_set_ad() as an unsigned value close to 4 GiB, so\ncrypto_aead_decrypt() walks far off the end of the scatterlist that\nonly spans the real frame.\n\nThe frame is fully attacker-controlled and reaches this path from any\nIEEE 802.15.4 peer in radio range. Reject frames whose payload is\nshorter than the authentication tag before the subtraction.\n\nDynamically reproduced on a KASAN kernel as a general-protection-fault\nin the AEAD scatterwalk, and the fix confirmed."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - Exploitation requires sending crafted IEEE 802.15.4 frames over the WPAN radio interface; any peer within RF range can reach mac802154 receive/decrypt without IP routing or local shell access, matching Adjacent wireless attack guidance like Bluetooth.\nAC:L - The attacker fully controls frame length and security header fields; once LLSEC is enabled on the victim, a single undersized MIC-only secured frame reliably triggers the assoclen underflow and was dynamically reproduced as a KASAN GPF.\nPR:N - No Linux credentials or capabilities are required on the target; exploitation is performed by an over-the-air 802.15.4 peer spoofing a known PAN device/key/frame counter, not via local syscalls, ioctl, or netlink.\nUI:N - No victim user action is needed beyond normal operation of an LLSEC-enabled 802.15.4 interface; the malicious frame is processed automatically in the softirq receive path before delivery to userspace.\nS:U - Impact is confined to kernel memory and availability on the attacked host\u0027s WPAN stack; it does not cross a VM, container, or IOMMU security boundary into a separate authority.\nC:H - The wrapped assoclen makes crypto_aead_decrypt() scatterwalk read gigabytes beyond the skb-backed scatterlist, causing out-of-bounds kernel memory reads that can disclose adjacent heap or slab data and enable further exploitation primitives.\nI:H - Kernel memory corruption in the AEAD decrypt scatterwalk path can be leveraged for control-flow hijack or arbitrary write primitives beyond the demonstrated crash, consistent with high integrity impact for exploitable OOB access in crypto handlers.\nA:H - The bug was reproduced on a KASAN kernel as a general-protection fault in the AEAD scatterwalk, and repeated malicious frames can panic or hang the kernel on LLSEC-enabled coordinators, gateways, and IoT border routers."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:29:39.507Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f27ce82eb04960465df71634b196a48a4ecafd50"
},
{
"url": "https://git.kernel.org/stable/c/2d6b42a61373144298070668fddf06efe79cf2ff"
},
{
"url": "https://git.kernel.org/stable/c/ec7e62d77193131227df49d654d118fdf5a59892"
},
{
"url": "https://git.kernel.org/stable/c/5bbf0cd9b6a7076af86c75e87e180099be2e11ae"
},
{
"url": "https://git.kernel.org/stable/c/de80808f37d99c6dc67bb6f97eea00c8f57a8821"
},
{
"url": "https://git.kernel.org/stable/c/f20dedce0429b293d4bad604e0d3f65d8ac96c83"
},
{
"url": "https://git.kernel.org/stable/c/e09e0301d616c1ef38a5e64e8e4326fd39df13cc"
},
{
"url": "https://git.kernel.org/stable/c/fd3a3f28ed60c6af4b2a39933b151d6b27842c3b"
}
],
"title": "mac802154: llsec: reject frames shorter than the authentication tag",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68125",
"datePublished": "2026-08-10T11:58:46.198Z",
"dateReserved": "2026-07-30T09:28:09.369Z",
"dateUpdated": "2026-08-19T16:29:39.507Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
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.
Loading…
Loading…