{"id":"CVE-2026-98698","title":"wifi: mac80211: handle empty FILS association request payload","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: handle empty FILS association request payload\n\nfils_encrypt_assoc_req() accepts a (Re)Association Request frame whose\nlast element is the FILS Session e…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 2f5b62f6534d336a62fdb9e88b186dd70b4323ef","Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 452f1c9b76f7a122bbc4630b9691bda4809677c4","Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 20f939b0c151d1d28e6b62a76b2454fa6fe877f2","Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 5bfd4b0b40b79781d900cb2f7da0685070f53c67","Linux 4.10"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:46:23.363Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98698","references":[{"url":"https://git.kernel.org/stable/c/2f5b62f6534d336a62fdb9e88b186dd70b4323ef"},{"url":"https://git.kernel.org/stable/c/452f1c9b76f7a122bbc4630b9691bda4809677c4"},{"url":"https://git.kernel.org/stable/c/20f939b0c151d1d28e6b62a76b2454fa6fe877f2"},{"url":"https://git.kernel.org/stable/c/5bfd4b0b40b79781d900cb2f7da0685070f53c67"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.517Z","slug":"CVE-2026-98698","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: handle empty FILS association request payload\n\nfils_encrypt_assoc_req() accepts a (Re)Association Request frame whose\nlast element is the FILS Session element.  crypt_len is then zero and\naes_siv_encrypt() is called with an empty plaintext.\n\nkmemdup() returns ZERO_SIZE_PTR for a zero-length allocation, so the\nunconditional sg_init_one() puts an invalid page into the scatterlist.\nWith CONFIG_DEBUG_SG this triggers a kernel BUG in sg_set_buf();\nwithout the debug check the bogus page is handed to the crypto backend.\n\nAES-SIV is defined for empty plaintext and the S2V result is then the\ncomplete output, so handle this case before the CTR step, which has\nnothing to encrypt.\n\n## Affected\n\n- `Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 2f5b62f6534d336a62fdb9e88b186dd70b4323ef`\n- `Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 452f1c9b76f7a122bbc4630b9691bda4809677c4`\n- `Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 20f939b0c151d1d28e6b62a76b2454fa6fe877f2`\n- `Linux >= 39404feee691a2dc524a629ed6eb5cfe5d8898d1 < 5bfd4b0b40b79781d900cb2f7da0685070f53c67`\n- `Linux 4.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}