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Vulnerability · Published Feb 27, 2024 · Assigned by Linux

CVE-2021-46934i2c: validate user data in compat ioctl

Low 3.3

In plain English

A low-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 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)3.3Low
Exploit odds (30 days)0.2%top 85.7% 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: i2c: validate user data in compat ioctl Wrong user data may cause warning in i2c_transfer(), ex: zero msgs. Userspace should not be able to trigger warnings, so this patch adds validation checks for user data in compact ioctl to prevent reported warnings

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-abi-stablelists4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-core4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-cross-headers4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-debug4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-debug-core4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-debug-devel4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-debug-modules4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-devel4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-doc4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-headers4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-modules4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-modules-extra4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-rt4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-core4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-debug4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-debug-core4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-debug-kvm4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-devel4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-kvm4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-modules4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-tools4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-tools-libs4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-zfcpdump4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8perf4.18.0-553.5.1.el8_10ALSA-2024:3618
AlmaLinux:8python3-perf4.18.0-553.5.1.el8_10ALSA-2024:3618
Debian:12linux5.15.15-1DEBIAN-CVE-2021-46934
Debian:13linux5.15.15-1DEBIAN-CVE-2021-46934
Debian:14linux5.15.15-1DEBIAN-CVE-2021-46934
Rocky Linux:8kernel0:4.18.0-553.5.1.el8_10RLSA-2024:3618
Rocky Linux:8kernel-rt0:4.18.0-553.5.1.rt7.346.el8_10RLSA-2024:3627
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-46934
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-46934
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-46934

Affected products (as reported)

VendorProductVersions
Linux Linux 7d5cb45655f2e9e37ef75d18f50c0072ef14a38b – before 407c8708fb1bf2d4afc5337ef50635cf540c364b7d5cb45655f2e9e37ef75d18f50c0072ef14a38b – before 9e4a3f47eff476097e0c7faac04d1831fc70237d7d5cb45655f2e9e37ef75d18f50c0072ef14a38b – before 8d31cbab4c295d7010ebb729e9d02d0e9cece18f7d5cb45655f2e9e37ef75d18f50c0072ef14a38b – before f68599581067e8a5a8901ba9eb270b4519690e267d5cb45655f2e9e37ef75d18f50c0072ef14a38b – before bb436283e25aaf1533ce061605d23a9564447bdf
Linux Linux 4.15

References