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Vulnerability · Published Oct 6, 2026 · Assigned by Linux

CVE-2026-98172smb: client: fix smbd_connection leak on cifs_get_tcp_session() error

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: smb: client: fix smbd_connection leak on cifs_get_tcp_session() error When an RDMA connection is successfully established via smbd_get_connection() but cifs_get_tcp_session() later fails (e.g. kthread_create() returns an error), the error path frees tcp_ses without first destroying the smbd_connection. Fix this by calling smbd_destroy() in the out_err cleanup path before kfree(tcp_ses). smbd_destroy() safely handles the case where smbd_conn is NULL, so it can be called unconditionally.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.190-1DEBIAN-CVE-2026-98172
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98172
Debian:14linux7.2.8-1DEBIAN-CVE-2026-98172
Debian:12linux-6.126.12.113-1~deb12u1DEBIAN-CVE-2026-98172
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98172
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98172
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98172
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-98172

Affected products (as reported)

VendorProductVersions
Linux Linux 2f8946464b11822169b9f10c7cf58a2440b51d54 – before c295f6505aec085d73e8dcea9f648c8af1b9da8c2f8946464b11822169b9f10c7cf58a2440b51d54 – before 45a97df1b7fe6c1ca5493f8fb5284203991aeeb92f8946464b11822169b9f10c7cf58a2440b51d54 – before 3164402c58940ff58a3cecdb026405f07b0253af2f8946464b11822169b9f10c7cf58a2440b51d54 – before e3344bb0ff5ec8a276f42239e140f5442841ef232f8946464b11822169b9f10c7cf58a2440b51d54 – before 5c908e49d349266dff0c86dda6a05df0ff19b8242f8946464b11822169b9f10c7cf58a2440b51d54 – before 928edc4bd6a617caabeb575fc13c254d9df623c42f8946464b11822169b9f10c7cf58a2440b51d54 – before b26a3fcf2f1c2cadba400290b639f01395db8fc82f8946464b11822169b9f10c7cf58a2440b51d54 – before e75c96157d45e498970158c8f7373d90102e33b9
Linux Linux 4.16

References