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Vulnerability · Published Oct 18, 2026 · Assigned by Linux

CVE-2026-98453smb: client: close handle after create-context parsing failure

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 92.7% 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: smb: client: close handle after create-context parsing failure SMB2_open() accounts a successful CREATE response as a remote open before parsing its create contexts. If smb2_parse_contexts() rejects malformed context data, SMB2_open() returns without closing the handle, leaving the server-side handle open and num_remote_opens elevated. Close the handle after a post-CREATE context parsing failure so the error path releases the remote resource and balances the open count.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-98453
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98453
Debian:14linux7.2.9-1DEBIAN-CVE-2026-98453
Debian:12linux-6.126.12.113-1~deb12u1DEBIAN-CVE-2026-98453
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98453
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98453
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98453
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-98453

Affected products (as reported)

VendorProductVersions
Linux Linux 13fb0fc4917621f3dfa285a27eaf7151d770b5e5 – before d4c05b5cb0a3132453e36a300d45de44bf6783c4890bc4fac3c0973a49cac35f634579bebba7fe48 – before ee61f1dc516d97afa79908140d0a8c556c2fe90c1ae3c59355dc9882e09c020afe8ffbd895ad0f29 – before 007b87f6a7c38959ed79cf7d3fd7b3b4eb5f67fd17a0f64cc02d4972e21c733d9f21d1c512963afa – before eaa97a196a107d4ef8775df2248181624151812eaf1689a9b7701d9907dfc84d2a4b57c4bc907144 – before 80c67cc71d32ccafc89a29b669243b40d81b930faf1689a9b7701d9907dfc84d2a4b57c4bc907144 – before f09875ff901e933e7b22c913daf51d21e9d93a45af1689a9b7701d9907dfc84d2a4b57c4bc907144 – before cdb36b09fb1f86d638d0afb44d621ed3f7c1d8ebaf1689a9b7701d9907dfc84d2a4b57c4bc907144 – before 566820af017e81497fb5e9d3ad6e7ffe2828bc8b
Linux Linux 6.7

References