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Vulnerability · Published Feb 27, 2025 · Assigned by Linux

CVE-2025-21736nilfs2: fix possible int overflows in nilfs_fiemap()

Medium 5.5

In plain English

A medium-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 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 82.9% 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: nilfs2: fix possible int overflows in nilfs_fiemap() Since nilfs_bmap_lookup_contig() in nilfs_fiemap() calculates its result by being prepared to go through potentially maxblocks == INT_MAX blocks, the value in n may experience an overflow caused by left shift of blkbits. While it is extremely unlikely to occur, play it safe and cast right hand expression to wider type to mitigate the issue. Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.129-1DEBIAN-CVE-2025-21736
Debian:13linux6.12.15-1DEBIAN-CVE-2025-21736
Debian:14linux6.12.15-1DEBIAN-CVE-2025-21736
Ubuntu:22.04:LTSlinux5.15.0-140.150UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux6.8.0-64.67UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-aws5.15.0-1084.91UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-aws6.8.0-1032.34UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1032.34~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure5.15.0-1089.98UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-azure6.8.0-1034.39UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1015.15~24.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1034.39~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1089.98.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1022.23UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-gcp5.15.0-1083.92UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-gcp6.8.0-1033.35UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1015.15~24.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1033.35~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-gke5.15.0-1081.87UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-gke6.8.0-1028.32UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1066.74UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1015.17UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-hwe-6.116.11.0-26.26~24.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-64.67~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-ibm5.15.0-1076.79UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-ibm6.8.0-1029.29UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1029.29~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1079.85UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-kvm5.15.0-1080.85UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-140.150UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-64.67.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.116.11.0-1014.15~24.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-64.67.1~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1078.79UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1031.34UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1010.10UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1031.34~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1031.34.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1037.37UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1008.8UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1026.26UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1022.22UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1031.31UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-oracle5.15.0-1081.87UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-oracle6.8.0-1029.30UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1029.30~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-raspi5.15.0-1078.81UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-raspi6.8.0-1031.35UBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-64.67~22.04.1UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-21736
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2025-21736
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1050.54UBUNTU-CVE-2025-21736

Affected products (as reported)

VendorProductVersions
Linux Linux 622daaff0a8975fb5c5b95f24f3234550ba32e92 – before 7649937987fed51ed09985da4019d50189fc534e622daaff0a8975fb5c5b95f24f3234550ba32e92 – before 58b1c6881081f5ddfb9a14dc241a74732c0f855c622daaff0a8975fb5c5b95f24f3234550ba32e92 – before 8f41df5fd4c11d26e929a85f7239799641f92da7622daaff0a8975fb5c5b95f24f3234550ba32e92 – before f3d80f34f58445355fa27b9579a449fb186aa64e622daaff0a8975fb5c5b95f24f3234550ba32e92 – before f2bd0f1ab47822fe5bd699c8458b896c4b2edea1622daaff0a8975fb5c5b95f24f3234550ba32e92 – before b9495a9109abc31d3170f7aad7d48aa64610a1a2622daaff0a8975fb5c5b95f24f3234550ba32e92 – before 250423300b4b0335918be187ef3cade248c06e6a622daaff0a8975fb5c5b95f24f3234550ba32e92 – before 6438ef381c183444f7f9d1de18f22661cba1e946
Linux Linux 2.6.38

References