Log in Start free

Vulnerability · Published Apr 16, 2025 · Assigned by Linux

CVE-2025-22039ksmbd: fix overflow in dacloffset bounds check

High 8.8

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 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 43.6% 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 overflow in dacloffset bounds check The dacloffset field was originally typed as int and used in an unchecked addition, which could overflow and bypass the existing bounds check in both smb_check_perm_dacl() and smb_inherit_dacl(). This could result in out-of-bounds memory access and a kernel crash when dereferencing the DACL pointer. This patch converts dacloffset to unsigned int and uses check_add_overflow() to validate access to the DACL.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.190-1DEBIAN-CVE-2025-22039
Debian:13linux6.12.25-1DEBIAN-CVE-2025-22039
Debian:14linux6.12.25-1DEBIAN-CVE-2025-22039
Ubuntu:22.04:LTSlinux5.15.0-202.212USN-8961-1
Ubuntu:22.04:LTSlinux5.15.0-202.212UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux6.8.0-86.87UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux6.8.0-86.87USN-7835-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-aws5.15.0-1119.126USN-8961-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1119.126UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-aws6.8.0-1041.43UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-aws6.8.0-1041.43USN-7835-1
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1041.43~22.04.1USN-7835-6
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1041.43~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure5.15.0-1125.134USN-8961-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1125.134UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-azure6.8.0-1041.47USN-7835-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1041.47UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1018.18~24.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1041.47~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1041.47~22.04.1USN-7835-1
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1124.133USN-8962-1
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1124.133UBUNTU-CVE-2025-22039
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1029.32USN-7940-2
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1029.32UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-gcp5.15.0-1120.130USN-8961-1
Ubuntu:22.04:LTSlinux-gcp5.15.0-1120.130UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-gcp6.8.0-1042.45UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-gcp6.8.0-1042.45USN-7835-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1016.16~24.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1042.45~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1042.45~22.04.1USN-7835-3
Ubuntu:22.04:LTSlinux-gke5.15.0-1115.121USN-8961-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1115.121UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-gke6.8.0-1038.43USN-7835-3
Ubuntu:24.04:LTSlinux-gke6.8.0-1038.43UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1102.110USN-8961-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1102.110UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1025.28USN-7835-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1025.28UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-hwe-6.116.11.0-28.28~24.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-86.87~22.04.1USN-7835-4
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-86.87~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-ibm5.15.0-1113.117UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-ibm5.15.0-1113.117USN-8961-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1039.39USN-7835-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1039.39UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1039.39~22.04.1USN-7835-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1039.39~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1114.120USN-8961-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1114.120UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-kvm5.15.0-1111.116USN-8961-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1111.116UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-197.207USN-8961-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-197.207UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-86.87.1UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-86.87.1USN-7835-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.116.11.0-1015.16~24.04.2UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-86.87.1~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-86.87.1~22.04.1USN-7835-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1114.115USN-8961-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1114.115UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1041.44USN-7835-3
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1041.44UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1012.12UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1041.44~22.04.2USN-7835-3
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1041.44~22.04.2UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1041.44.1USN-7835-3
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1041.44.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72USN-8963-1
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1012.12UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59USN-8963-1
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1024.24UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-oracle5.15.0-1116.122UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-oracle5.15.0-1116.122USN-8961-1
Ubuntu:24.04:LTSlinux-oracle6.8.0-1038.39USN-7835-1
Ubuntu:24.04:LTSlinux-oracle6.8.0-1038.39UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1038.39~22.04.1USN-7835-5
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1038.39~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-raspi6.8.0-1041.45UBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-raspi6.8.0-1041.45USN-7887-2
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-86.87~22.04.1UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-22039
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1018.19UBUNTU-CVE-2025-22039
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-22039

Affected products (as reported)

VendorProductVersions
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf – before abbb4ec41867f2cd1c971258e493893bf43bcbd30626e6641f6b467447c81dd7678a69c66f7746cf – before 8483d7b532be1d1bc149556a2fedf903868c63030626e6641f6b467447c81dd7678a69c66f7746cf – before 73f074fb5e139cd42ad75089abe4e28a49a300030626e6641f6b467447c81dd7678a69c66f7746cf – before 6a9cd9ff0fa2bcc30b2bfb8bdb161eb20e44b9dc0626e6641f6b467447c81dd7678a69c66f7746cf – before 6b8d379048b168a0dff5ab1acb975b933f3685140626e6641f6b467447c81dd7678a69c66f7746cf – before 443b373a4df5a2cb9f7b8c4658b2afedeb16397f0626e6641f6b467447c81dd7678a69c66f7746cf – before beff0bc9d69bc8e733f9bca28e2d3df5b3e10e42
Linux Linux 5.15

References