CVE-2026-98698

wifi: mac80211: handle empty FILS association request payload

State: Published
Severity: Not scored
Published: Oct 18, 2026
Updated: Oct 30, 2026
Reserved: Sep 25, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before de3297c8e521c0b0ddc89ece6fee84e25da9ecf0Affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before ce70c87252a14020cb40032efe208efc6e61b1eeAffected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before d8c5dbbf584a1baaa008988ac64dd4495f7086bdAffected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 0b1e4a7eeb6a301ee33bd318982927cbdbae9f36Affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 2f5b62f6534d336a62fdb9e88b186dd70b4323efAffected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 452f1c9b76f7a122bbc4630b9691bda4809677c4Affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 20f939b0c151d1d28e6b62a76b2454fa6fe877f2Affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 5bfd4b0b40b79781d900cb2f7da0685070f53c67Affected
LinuxLinux	4.10Affected before 4.10Not affected 5.10.273 through 5.10.Not affected 5.15.224 through 5.15.Not affected 6.1.191 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.113 through 6.12.Not affected 6.18.56 through 6.18.Not affected 7.2.10 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before de3297c8e521c0b0ddc89ece6fee84e25da9ecf0Affected
39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before ce70c87252a14020cb40032efe208efc6e61b1eeAffected
39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before d8c5dbbf584a1baaa008988ac64dd4495f7086bdAffected
39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 0b1e4a7eeb6a301ee33bd318982927cbdbae9f36Affected
39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 2f5b62f6534d336a62fdb9e88b186dd70b4323efAffected
39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 452f1c9b76f7a122bbc4630b9691bda4809677c4Affected
39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 20f939b0c151d1d28e6b62a76b2454fa6fe877f2Affected
39404feee691a2dc524a629ed6eb5cfe5d8898d1 to before 5bfd4b0b40b79781d900cb2f7da0685070f53c67Affected

LinuxLinux

4.10Affected
before 4.10Not affected
5.10.273 through 5.10.*Not affected
5.15.224 through 5.15.*Not affected
6.1.191 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.113 through 6.12.*Not affected
6.18.56 through 6.18.*Not affected
7.2.10 through 7.2.*Not affected
7.3 and laterNot affected

References

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