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Vulnerability · Published Dec 16, 2025 · Assigned by Linux

CVE-2025-68266bfs: Reconstruct file type when loading from disk

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 87.7% 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: bfs: Reconstruct file type when loading from disk syzbot is reporting that S_IFMT bits of inode->i_mode can become bogus when the S_IFMT bits of the 32bits "mode" field loaded from disk are corrupted or when the 32bits "attributes" field loaded from disk are corrupted. A documentation says that BFS uses only lower 9 bits of the "mode" field. But I can't find an explicit explanation that the unused upper 23 bits (especially, the S_IFMT bits) are initialized with 0. Therefore, ignore the S_IFMT bits of the "mode" field loaded from disk. Also, verify that the value of the "attributes" field loaded from disk is either BFS_VREG or BFS_VDIR (because BFS supports only regular files and the root directory).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.162-1DSA-6127-1
Debian:12linux6.1.162-1DEBIAN-CVE-2025-68266
Debian:13linux6.12.63-1DEBIAN-CVE-2025-68266
Debian:14linux6.17.12-1DEBIAN-CVE-2025-68266
Ubuntu:22.04:LTSlinux5.15.0-173.183UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux6.8.0-110.110UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux6.8.0-110.110USN-8179-1
Ubuntu:25.10linux6.17.0-19.19UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-aws5.15.0-1103.110UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-aws6.8.0-1052.55UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-aws6.8.0-1052.55USN-8179-1
Ubuntu:25.10linux-aws6.17.0-1009.9UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1009.9~24.04.2UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1052.55~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1052.55~22.04.1USN-8179-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1109.118UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure6.8.0-1054.60USN-8258-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1054.60UBUNTU-CVE-2025-68266
Ubuntu:25.10linux-azure6.17.0-1010.10UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure-6.176.17.0-1010.10~24.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1USN-8440-1
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1109.118.1UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-68266
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-gcp5.15.0-1103.112UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-gcp6.8.0-1054.57USN-8179-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1054.57UBUNTU-CVE-2025-68266
Ubuntu:25.10linux-gcp6.17.0-1009.9UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1009.9~24.04.3UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1054.57~22.04.1USN-8179-4
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1054.57~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-gke5.15.0-1099.105UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-gke6.8.0-1050.56UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-gke6.8.0-1050.56USN-8179-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1086.94UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1037.40USN-8179-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1037.40UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-hwe-6.176.17.0-19.19~24.04.2UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-110.110~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-110.110~22.04.1USN-8179-3
Ubuntu:22.04:LTSlinux-ibm5.15.0-1097.100UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-ibm6.8.0-1051.51UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-ibm6.8.0-1051.51USN-8179-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1051.51~22.04.1USN-8179-3
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1051.51~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1098.104UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-kvm5.15.0-1095.100UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-173.183UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-110.110.1USN-8179-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-110.110.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-110.110.1~22.04.1USN-8179-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-110.110.1~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1098.99UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1051.54UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1051.54USN-8185-1
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1018.18UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1051.54~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1051.54~22.04.1USN-8185-1
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1051.54.1USN-8185-2
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1051.54.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1055.55UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1022.22UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1022.22USN-8265-1
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1044.44UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1017.17UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-oracle5.15.0-1100.106UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oracle6.8.0-1049.50UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oracle6.8.0-1049.50USN-8203-1
Ubuntu:25.10linux-oracle6.17.0-1009.9UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1009.9~24.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1049.50~22.04.1USN-8203-1
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1049.50~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-raspi5.15.0-1097.100UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-raspi6.8.0-1052.56USN-8179-3
Ubuntu:24.04:LTSlinux-raspi6.8.0-1052.56UBUNTU-CVE-2025-68266
Ubuntu:25.10linux-raspi6.17.0-1010.10UBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-68266
Ubuntu:25.10linux-realtime6.17.0-1008.9UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-68266
Ubuntu:25.10linux-riscv6.17.0-19.19.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-riscv-6.176.17.0-19.19.1~24.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-110.110~22.04.1UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-68266
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1028.29UBUNTU-CVE-2025-68266
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1067.71UBUNTU-CVE-2025-68266

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before d0c5ec1f57d8fbb953f166a27d9d32473dc8f3e41da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before aeccd6743ee4fdd1ab8cfcbb5b9a20b613418f6d1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 8f73336b75bd3457b6f9410f2a0601a238f322381da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before a9f626396bfe66f49b743601e862767928237cc01da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 77899444d46162aeb65f229590c26ba2668642231da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before a8cb796e7e2cb7971311ba236922f5e7e1be77e61da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 34ab4c75588c07cca12884f2bf6b0347c7a13872
Linux Linux 2.6.12

References