Vulnerability · Published Aug 19, 2025 · Assigned by Linux

CVE-2025-38556HID: core: Harden s32ton() against conversion to 0 bits

High 7.1

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 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.1High
Exploit odds (30 days)0.2%top 93.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: HID: core: Harden s32ton() against conversion to 0 bits Testing by the syzbot fuzzer showed that the HID core gets a shift-out-of-bounds exception when it tries to convert a 32-bit quantity to a 0-bit quantity. Ideally this should never occur, but there are buggy devices and some might have a report field with size set to zero; we shouldn't reject the report or the device just because of that. Instead, harden the s32ton() routine so that it returns a reasonable result instead of crashing when it is called with the number of bits set to 0 -- the same as what snto32() does.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:8kernel4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-debug5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-debug-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-debug-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-debug-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-devel-matched5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-64k-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:10kernel-abi-stablelists6.12.0-55.39.1.el10_0ALSA-2025:17776
AlmaLinux:8kernel-abi-stablelists4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-abi-stablelists5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-core4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-cross-headers4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-cross-headers5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-debug4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-debug5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-debug-core4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-debug-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-debug-devel4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-debug-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-debug-devel-matched5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-debug-modules4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-debug-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-debug-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-debug-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-debug-uki-virt5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-devel4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-devel-matched5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:10kernel-doc6.12.0-55.39.1.el10_0ALSA-2025:17776
AlmaLinux:8kernel-doc4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-doc5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-headers4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-headers5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-modules4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-modules-extra4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-debug5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-debug5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-debug-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-debug-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-debug-kvm5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-debug-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-kvm5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-rt-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-tools4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-tools5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-tools-libs4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-tools-libs5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-tools-libs-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-uki-virt5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-uki-virt-addons5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-zfcpdump4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-zfcpdump5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-zfcpdump-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-zfcpdump-devel5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-zfcpdump-modules5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9libperf5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8perf4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9perf5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:8python3-perf4.18.0-553.76.1.el8_10ALSA-2025:16372
AlmaLinux:9python3-perf5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9rtla5.14.0-570.52.1.el9_6ALSA-2025:17760
AlmaLinux:9rv5.14.0-570.52.1.el9_6ALSA-2025:17760
Debian:12linux6.1.159-1DEBIAN-CVE-2025-38556
Debian:13linux6.12.48-1DSA-6008-1
Debian:13linux6.12.48-1DEBIAN-CVE-2025-38556
Debian:14linux6.16.3-1DEBIAN-CVE-2025-38556
Rocky Linux:10kernel0:6.12.0-55.39.1.el10_0RLSA-2025:17776
Rocky Linux:8kernel0:4.18.0-553.76.1.el8_10RLSA-2025:16372
Rocky Linux:9kernel0:5.14.0-570.52.1.el9_6RLSA-2025:17760
Ubuntu:22.04:LTSlinux5.15.0-173.183USN-8096-1
Ubuntu:22.04:LTSlinux5.15.0-173.183UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux6.8.0-106.106USN-8095-1
Ubuntu:24.04:LTSlinux6.8.0-106.106UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-aws5.15.0-1103.110UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-aws5.15.0-1103.110USN-8096-1
Ubuntu:24.04:LTSlinux-aws6.8.0-1050.53UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-aws6.8.0-1050.53USN-8095-1
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-aws-6.146.14.0-1017.17~24.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1050.53~22.04.1USN-8095-4
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1050.53~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure5.15.0-1109.118USN-8163-2
Ubuntu:22.04:LTSlinux-azure5.15.0-1109.118UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure6.8.0-1051.57UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure6.8.0-1051.57USN-8125-1
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure-6.146.14.0-1017.17~24.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1051.57~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1109.118.1UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-38556
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-gcp5.15.0-1103.112UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-gcp5.15.0-1103.112USN-8096-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1052.55UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-gcp6.8.0-1052.55USN-8095-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-gcp-6.146.14.0-1020.21~24.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1052.55~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1052.55~22.04.1USN-8095-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1099.105USN-8096-3
Ubuntu:22.04:LTSlinux-gke5.15.0-1099.105UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-gke6.8.0-1048.53USN-8095-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1048.53UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1086.94USN-8096-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1086.94UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1035.38UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1035.38USN-8095-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-106.106~22.04.1USN-8095-1
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-106.106~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-ibm5.15.0-1097.100UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-ibm5.15.0-1097.100USN-8096-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1049.49UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-ibm6.8.0-1049.49USN-8095-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1049.49~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1049.49~22.04.1USN-8095-1
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1098.104UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1098.104USN-8096-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1095.100USN-8096-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1095.100UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-173.183USN-8096-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-173.183UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-106.106.1UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-106.106.1USN-8095-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-106.106.1~22.04.1USN-8095-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-106.106.1~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1098.99UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1098.99USN-8096-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1049.52USN-8100-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1049.52UBUNTU-CVE-2025-38556
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1049.52~22.04.1UBUNTU-CVE-2025-38556
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1049.52~22.04.1USN-8100-1

Affected products (as reported)

VendorProductVersions
Linux Linux dde5845a529ff753364a6d1aea61180946270bfa – before 6cdf6c708717c5c6897d0800a1793e83757c7491dde5845a529ff753364a6d1aea61180946270bfa – before eeeaba737919bdce9885e2a00ac2912f61a3684ddde5845a529ff753364a6d1aea61180946270bfa – before 3c86548a20d7bc2861aa4de044991a327bebad1adde5845a529ff753364a6d1aea61180946270bfa – before 810189546cb6c8f36443ed091d91f1f5d2fc2ec7dde5845a529ff753364a6d1aea61180946270bfa – before d3b504146c111548ab60b6ef7aad00bfb1db05a2dde5845a529ff753364a6d1aea61180946270bfa – before 8b4a94b1510f6a46ec48494b52ee8f67eb4fc836dde5845a529ff753364a6d1aea61180946270bfa – before 865ad8469fa24de1559f247d9426ab01e5ce3a56dde5845a529ff753364a6d1aea61180946270bfa – before a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd
Linux Linux 2.6.20

References