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Vulnerability · Published Jan 13, 2026 · Assigned by Linux

CVE-2025-68806ksmbd: fix buffer validation by including null terminator size in EA length

High 7.5

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 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 61.0% 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: fix buffer validation by including null terminator size in EA length The smb2_set_ea function, which handles Extended Attributes (EA), was performing buffer validation checks that incorrectly omitted the size of the null terminating character (+1 byte) for EA Name. This patch fixes the issue by explicitly adding '+ 1' to EaNameLength where the null terminator is expected to be present in the buffer, ensuring the validation accurately reflects the total required buffer size.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.162-1DEBIAN-CVE-2025-68806
Debian:13linux6.12.69-1DEBIAN-CVE-2025-68806
Debian:14linux6.18.3-1DEBIAN-CVE-2025-68806
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux6.8.0-110.110UBUNTU-CVE-2025-68806
Ubuntu:25.10linux6.17.0-22.22UBUNTU-CVE-2025-68806
Ubuntu:25.10linux6.17.0-22.22USN-8177-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-aws6.8.0-1052.55UBUNTU-CVE-2025-68806
Ubuntu:25.10linux-aws6.17.0-1012.12UBUNTU-CVE-2025-68806
Ubuntu:25.10linux-aws6.17.0-1012.12USN-8183-2
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1012.12~24.04.1USN-8183-2
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1012.12~24.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1052.55~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure6.8.0-1054.60UBUNTU-CVE-2025-68806
Ubuntu:25.10linux-azure6.17.0-1013.13USN-8245-1
Ubuntu:25.10linux-azure6.17.0-1013.13UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure-6.176.17.0-1013.13~24.04.1USN-8245-1
Ubuntu:24.04:LTSlinux-azure-6.176.17.0-1013.13~24.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-68806
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-gcp6.8.0-1054.57UBUNTU-CVE-2025-68806
Ubuntu:25.10linux-gcp6.17.0-1012.12USN-8183-1
Ubuntu:25.10linux-gcp6.17.0-1012.12UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1012.12~24.04.1UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1012.12~24.04.1USN-8183-1
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1054.57~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-gke6.8.0-1050.56UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1037.40UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-hwe-6.176.17.0-22.22~24.04.1UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-hwe-6.176.17.0-22.22~24.04.1USN-8183-2
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-110.110~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-ibm6.8.0-1051.51UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1051.51~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-110.110.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-110.110.1~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1051.54UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1018.18UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1051.54~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1051.54.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1022.22UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1020.20UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1020.20USN-8245-1
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oracle6.8.0-1049.50UBUNTU-CVE-2025-68806
Ubuntu:25.10linux-oracle6.17.0-1011.11USN-8183-2
Ubuntu:25.10linux-oracle6.17.0-1011.11UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1011.11~24.04.1UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1011.11~24.04.1USN-8183-2
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1049.50~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-raspi6.8.0-1052.56UBUNTU-CVE-2025-68806
Ubuntu:25.10linux-raspi6.17.0-1013.13UBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-68806
Ubuntu:25.10linux-realtime6.17.0-1010.11USN-8177-1
Ubuntu:25.10linux-realtime6.17.0-1010.11UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-68806
Ubuntu:25.10linux-riscv6.17.0-22.22.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-riscv-6.176.17.0-22.22.1~24.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-110.110~22.04.1UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-68806
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1028.29UBUNTU-CVE-2025-68806
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-68806

Affected products (as reported)

VendorProductVersions
Linux Linux d070c4dd2a5bed4e9832eec5b6c029c7d14892ea – before cae52c592a07e1d3fa3338a5f064a374a5f267500ba5439d9afa2722e7728df56f272c89987540a4 – before a28a375a5439eb474e9f284509a407efb479c9250ba5439d9afa2722e7728df56f272c89987540a4 – before d26af6d14da43ab92d07bc60437c62901dc522e60ba5439d9afa2722e7728df56f272c89987540a4 – before 6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e40ba5439d9afa2722e7728df56f272c89987540a4 – before 95d7a890e4b03e198836d49d699408fd1867cb55bb5bf157b5be1643cccc7cbbe57fcdef9ae52c2c1a13ecb96230e8b7b91967e292836f7b01ec8111404e7c01e16288b5e0171d1d8fd3328e806d0794
Linux Linux 6.6

References