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CVE-2026-98698

unscored Published
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: handle empty FILS association request payload fils_encrypt_assoc_req() accepts a (Re)Association Request frame whose last element is the FILS Session element. crypt_len is then zero and aes_siv_encrypt() is called with an empty plaintext. kmemdup() returns ZERO_SIZE_PTR for a zero-length allocation, so the unconditional sg_init_one() puts an invalid page into the scatterlist. With CONFIG_DEBUG_SG this triggers a kernel BUG in sg_set_buf(); without the debug check the bogus page is handed to the crypto backend. AES-SIV is defined for empty plaintext and the S2V result is then the complete output, so handle this case before the CTR step, which has nothing to encrypt.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 5

  1. StatusReceived → PublishedNVD modified 2026-10-21 12:55
  2. References+1 references (now 5)NVD modified 2026-10-21 13:21
  3. StatusPublished → ReceivedNVD modified 2026-10-21 13:21
  4. StatusReceived → PublishedNVD modified 2026-10-19 09:24
  5. First seenunscoredNVD modified 2026-10-19 10:19

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 5