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 7018 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)
guessed Create a notification for this product.
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      "current_release_date": "2026-10-22T23:46:44Z",
      "cve": "CVE-2026-98698",
      "id": "CVE-2026-98698",
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      "product_status:known_affected": "145",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98698",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-98698.json",
      "version": "4"
    }
  }
}



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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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