CVE-2026-98698 (GCVE-0-2026-98698)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:46 – Updated: 2026-10-30 12:38
VLAI
Title
wifi: mac80211: handle empty FILS association request payload
Summary
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < de3297c8e521c0b0ddc89ece6fee84e25da9ecf0 (git)
Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < ce70c87252a14020cb40032efe208efc6e61b1ee (git)
Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < d8c5dbbf584a1baaa008988ac64dd4495f7086bd (git)
Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < 0b1e4a7eeb6a301ee33bd318982927cbdbae9f36 (git)
Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < 2f5b62f6534d336a62fdb9e88b186dd70b4323ef (git)
Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < 452f1c9b76f7a122bbc4630b9691bda4809677c4 (git)
Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < 20f939b0c151d1d28e6b62a76b2454fa6fe877f2 (git)
Affected: 39404feee691a2dc524a629ed6eb5cfe5d8898d1 , < 5bfd4b0b40b79781d900cb2f7da0685070f53c67 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 5.10.273 , ≤ 5.10.* (semver)
Unaffected: 5.15.224 , ≤ 5.15.* (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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    "datePublished": "2026-10-18T15:46:23.363Z",
    "dateReserved": "2026-09-25T10:25:14.365Z",
    "dateUpdated": "2026-10-30T12:38:50.641Z",
    "state": "PUBLISHED"
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      "current_release_date": "2026-10-30T06:49:24+00:00",
      "cve": "CVE-2026-98698",
      "id": "CVE-2026-98698",
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      "product_status:known_affected": "237",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mac80211: handle empty FILS association request payload",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98698.json",
      "version": "3"
    }
  }
}



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