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Vulnerability · Published Sep 17, 2026 · Assigned by Linux

CVE-2026-90152smb/server: fix session leak in ksmbd_session_register()

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 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 88.1% 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/server: fix session leak in ksmbd_session_register() See the procedure below: smb2_sess_setup ksmbd_smb2_session_create __session_create atomic_set(&sess->refcnt, 2) hash_add(sessions_table, &sess->hlist, sess->id) ksmbd_session_register xa_store(&conn->sessions, sess->id, sess) // fail ksmbd_user_session_put atomic_dec(&sess->refcnt) // refcnt is 1, session is not freed Remove the session from sessions_table and drop its table reference if xa_store() fails.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-90152
Debian:13linux6.12.111-1DEBIAN-CVE-2026-90152
Debian:14linux7.2.6-1DEBIAN-CVE-2026-90152
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-90152
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-90152
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-90152
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-90152
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-90152

Affected products (as reported)

VendorProductVersions
Linux Linux f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b – before 869807cdd5599c289c21d40f36a504d72a0d23c6f5c779b7ddbda30866cf2a27c63e34158f858c73 – before 988f99bfddda4e2d1da5f6e98b237dd85e123ceef5c779b7ddbda30866cf2a27c63e34158f858c73 – before 03a22a003f41b182245e6c71fe565e277cff7094f5c779b7ddbda30866cf2a27c63e34158f858c73 – before b967a595fb735d313a8676b2ca6a4cba38506482f5c779b7ddbda30866cf2a27c63e34158f858c73 – before 55c677619084f9c9fa4146d933cc8ccafc924c87f5c779b7ddbda30866cf2a27c63e34158f858c73 – before 99b25b046e47e4904373cfeb445c5483f1633d88708c304b583d789957399dd8237f212cf8ad1e4dd270631c21e68fb8016d6e231d022d7023a2df6f
Linux Linux 6.4

References