CVE-2026-68125High· 8.8▾ TwilightIn 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 += d…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.3%
Last analysed / modified upstream
0.3% → 0.3%
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.
Linux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < f27ce82eb04960465df71634b196a48a4ecafd50Linux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < 2d6b42a61373144298070668fddf06efe79cf2ffLinux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < ec7e62d77193131227df49d654d118fdf5a59892Linux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < 5bbf0cd9b6a7076af86c75e87e180099be2e11aeLinux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < de80808f37d99c6dc67bb6f97eea00c8f57a8821Linux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < f20dedce0429b293d4bad604e0d3f65d8ac96c83Linux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < e09e0301d616c1ef38a5e64e8e4326fd39df13ccLinux >= 4c14a2fb5d143e4ed94143be2b8c1961b47df9af < fd3a3f28ed60c6af4b2a39933b151d6b27842c3bLinux 3.16Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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