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Vulnerability · Published Oct 18, 2026 · Assigned by Linux

CVE-2026-98698wifi: mac80211: handle empty FILS association request payload

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 92.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-98698
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98698
Debian:14linux7.2.10-1DEBIAN-CVE-2026-98698
Debian:12linux-6.126.12.113-1~deb12u1DEBIAN-CVE-2026-98698
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98698
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98698
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98698
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-98698

Affected products (as reported)

VendorProductVersions
Linux Linux 39404feee691a2dc524a629ed6eb5cfe5d8898d1 – before de3297c8e521c0b0ddc89ece6fee84e25da9ecf039404feee691a2dc524a629ed6eb5cfe5d8898d1 – before ce70c87252a14020cb40032efe208efc6e61b1ee39404feee691a2dc524a629ed6eb5cfe5d8898d1 – before d8c5dbbf584a1baaa008988ac64dd4495f7086bd39404feee691a2dc524a629ed6eb5cfe5d8898d1 – before 0b1e4a7eeb6a301ee33bd318982927cbdbae9f3639404feee691a2dc524a629ed6eb5cfe5d8898d1 – before 2f5b62f6534d336a62fdb9e88b186dd70b4323ef39404feee691a2dc524a629ed6eb5cfe5d8898d1 – before 452f1c9b76f7a122bbc4630b9691bda4809677c439404feee691a2dc524a629ed6eb5cfe5d8898d1 – before 20f939b0c151d1d28e6b62a76b2454fa6fe877f239404feee691a2dc524a629ed6eb5cfe5d8898d1 – before 5bfd4b0b40b79781d900cb2f7da0685070f53c67
Linux Linux 4.10

References