CVE-2026-98698wifi: mac80211: handle empty FILS association request payload
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | 39404feee691a2dc524a629ed6eb5cfe5d8898d1 builds before 2f5b62f6534d336a62fdb9e88b186dd70b4323ef; 39404feee691a2dc524a629ed6eb5cfe5d8898d1 builds before 452f1c9b76f7a122bbc4630b9691bda4809677c4; 39404feee691a2dc524a629ed6eb5cfe5d8898d1 builds before 20f939b0c151d1d28e6b62a76b2454fa6fe877f2; 39404feee691a2dc524a629ed6eb5cfe5d8898d1 builds before 5bfd4b0b40b79781d900cb2f7da0685070f53c67 | CNA record |
References
- https://git.kernel.org/stable/c/2f5b62f6534d336a62fdb9e88b186dd70b4323ef
- https://git.kernel.org/stable/c/452f1c9b76f7a122bbc4630b9691bda4809677c4
- https://git.kernel.org/stable/c/20f939b0c151d1d28e6b62a76b2454fa6fe877f2
- https://git.kernel.org/stable/c/5bfd4b0b40b79781d900cb2f7da0685070f53c67
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.