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Vulnerability · Published Oct 28, 2026 · Assigned by Linux

CVE-2026-99114ksmbd: initialize FileSystemControlFlags in FS_CONTROL_INFORMATION

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 93.2% 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: initialize FileSystemControlFlags in FS_CONTROL_INFORMATION smb2_get_info_filesystem() reports 48 bytes for FS_CONTROL_INFORMATION, that is the whole of struct smb2_fs_control_info, but never assigns FileSystemControlFlags. Those four bytes go to the client as they are found in the response buffer. The buffer is zeroed on allocation, so a standalone request leaks nothing. A compound request can leak: the offset of the next response is advanced by the length pinned for the previous one, so a reply that was written into the buffer and then dropped in favour of the short error response of smb2_set_err_rsp() stays there, and the next reply is laid over it with only the header cleared. ksmbd does not implement quota tracking, so report no control flags.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-99114
Debian:13linux6.12.115-2DEBIAN-CVE-2026-99114
Debian:14linux7.2.13-1DEBIAN-CVE-2026-99114
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99114
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-99114
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-99114
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-99114

Affected products (as reported)

VendorProductVersions
Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before 995456b5e703e128904a6cbc8b3347eb3d04c72ce2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before c78aea8984c84767e87f677477e4784deb8adfdee2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before e8b82184a1982894820a91a72ac9857ddd5dffbfe2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before 370459776468fc68c97008360108f381e3120953e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before d8c450ad0d08980b39b08d435efa921086c8b227e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before 03bb4338c3a7c3fc4decf699a35753f0891aab2ae2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – before c0cd3fc6824122014da2b3b0cb7ddeaa2946ec8e
Linux Linux 5.15

References