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Vulnerability · Published Feb 18, 2026 · Assigned by Linux

CVE-2026-23226ksmbd: add chann_lock to protect ksmbd_chann_list xarray

High 8.8

In plain English

A high-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 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.5%top 56.7% 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: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-23226
Debian:13linux6.12.85-1DEBIAN-CVE-2026-23226
Debian:14linux6.18.12-1DEBIAN-CVE-2026-23226
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux6.8.0-136.136USN-8567-1
Ubuntu:24.04:LTSlinux6.8.0-136.136UBUNTU-CVE-2026-23226
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-aws6.8.0-1061.64UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-aws6.8.0-1061.64USN-8595-2
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1061.64~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1061.64~22.04.1USN-8595-3
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure6.8.0-1063.71UBUNTU-CVE-2026-23226
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1063.71~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1062.69UBUNTU-CVE-2026-23226
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1062.69~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-gcp6.8.0-1064.72USN-8567-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1064.72UBUNTU-CVE-2026-23226
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1064.72~22.04.1USN-8567-1
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1064.72~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-gke6.8.0-1059.67USN-8567-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1059.67UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1046.50UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1046.50USN-8567-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-136.136~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-ibm6.8.0-1061.62UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-ibm6.8.0-1061.62USN-8574-3
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1061.62~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1061.62~22.04.1USN-8574-3
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-136.136.2USN-8574-2
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-136.136.2UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-136.136.2~22.04.1USN-8574-2
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-136.136.2~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1059.62UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1059.62USN-8596-1
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1059.62~22.04.1USN-8596-1
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1059.62~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1059.62.1USN-8596-1
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1059.62.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1030.31UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1030.31USN-8574-3
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-oracle6.8.0-1058.61USN-8574-2
Ubuntu:24.04:LTSlinux-oracle6.8.0-1058.61UBUNTU-CVE-2026-23226
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1058.61~22.04.1USN-8595-1
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1058.61~22.04.1UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-raspi6.8.0-1061.65USN-8665-1
Ubuntu:24.04:LTSlinux-raspi6.8.0-1061.65UBUNTU-CVE-2026-23226
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-23226
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-136.136~22.04.3UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-23226
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1033.34USN-8574-3
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1033.34UBUNTU-CVE-2026-23226
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-23226

Affected products (as reported)

VendorProductVersions
Linux Linux 91bbf9cb2387a0d76322e9a343bc6bc160f66b3f – before c00f3938f7ac52770907768e440cf253af9cbb631d9c4172110e645b383ff13eee759728d74f1a5d – before 43ad494ac6e940a8eabf25d5bd77bb3bb53b11531d9c4172110e645b383ff13eee759728d74f1a5d – before 4c2ca31608521895dd742a43beca4b4d297623451d9c4172110e645b383ff13eee759728d74f1a5d – before e4a8a96a93d08570e0405cfd989a8a07e5b6ff331d9c4172110e645b383ff13eee759728d74f1a5d – before 36ef605c0395b94b826a8c8d6f2697071173de6e1d9c4172110e645b383ff13eee759728d74f1a5d – before 4f3a06cc57976cafa8c6f716646be6c79a99e485b1caecbf34b8c8260d851ec4efde71f3694460b7853c416710b075153c1e1421e099ffbe5dac68ce
Linux Linux 6.3

References