Log in Start free

Vulnerability · Published Sep 17, 2026 · Assigned by Linux

CVE-2026-90104NFSv4.1: zero referring call lists before decoding

Critical 9.8

In plain English

A critical-severity 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 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 45.6% 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: NFSv4.1: zero referring call lists before decoding decode_cb_sequence_args() allocates csa_rclists with kmalloc_objs(), so each referring_call_list starts uninitialized. decode_rc_list() assigns rcl_refcalls only when rcl_nrefcalls is nonzero. A valid list with zero referring calls therefore leaves the pointer uninitialized, and nfs4_callback_sequence() later passes stale slab contents to kfree(). Allocate csa_rclists with kzalloc_objs() so every rcl_refcalls member is NULL from the beginning, including valid empty referring call lists.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-90104
Debian:13linux6.12.115-2DEBIAN-CVE-2026-90104
Debian:14linux7.2.6-1DEBIAN-CVE-2026-90104
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90104
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-90104
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-90104
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-90104

Affected products (as reported)

VendorProductVersions
Linux Linux 4aece6a19cf7f474f15eb861ba74db4479884ce3 – before 810f6b3a29ac96fdc16909132b31627dae6824c24aece6a19cf7f474f15eb861ba74db4479884ce3 – before ed54460caf5b5aa65ec03c9a6032d831f39f19f54aece6a19cf7f474f15eb861ba74db4479884ce3 – before 7510a5b9edec9d9536a4e69f10edfb2592e6cf7f4aece6a19cf7f474f15eb861ba74db4479884ce3 – before f4d23937e1c41995c2f54af26c89b5e48a41c2994aece6a19cf7f474f15eb861ba74db4479884ce3 – before f31f3c042e024aef437cda42f0424ae8d4594b6c4aece6a19cf7f474f15eb861ba74db4479884ce3 – before 8fa4804fe62ca4155a2d8fc2789d630376cbf2fc
Linux Linux 2.6.31

References