{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68125", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.369Z", "datePublished": "2026-08-10T11:58:46.198Z", "dateUpdated": "2026-08-19T16:29:39.507Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:29:39.507Z" }, "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": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "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's 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/mac802154/llsec.c" ], "versions": [ { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "f27ce82eb04960465df71634b196a48a4ecafd50", "status": "affected", "versionType": "git" }, { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "2d6b42a61373144298070668fddf06efe79cf2ff", "status": "affected", "versionType": "git" }, { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "ec7e62d77193131227df49d654d118fdf5a59892", "status": "affected", "versionType": "git" }, { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "5bbf0cd9b6a7076af86c75e87e180099be2e11ae", "status": "affected", "versionType": "git" }, { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "de80808f37d99c6dc67bb6f97eea00c8f57a8821", "status": "affected", "versionType": "git" }, { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "f20dedce0429b293d4bad604e0d3f65d8ac96c83", "status": "affected", "versionType": "git" }, { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "e09e0301d616c1ef38a5e64e8e4326fd39df13cc", "status": "affected", "versionType": "git" }, { "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af", "lessThan": "fd3a3f28ed60c6af4b2a39933b151d6b27842c3b", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/mac802154/llsec.c" ], "versions": [ { "version": "3.16", "status": "affected" }, { "version": "0", "lessThan": "3.16", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "7.1.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "7.2" } ] } ] } ], "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" } } } }