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Vulnerability · Published Mar 4, 2024 · Assigned by Linux

CVE-2021-47101asix: fix uninit-value in asix_mdio_read()

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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.1High
Exploit odds (30 days)0.2%top 87.3% 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: asix: fix uninit-value in asix_mdio_read() asix_read_cmd() may read less than sizeof(smsr) bytes and in this case smsr will be uninitialized. Fail log: BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497 BUG: KMSAN: uninit-value in asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497 asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497 asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-abi-stablelists4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-core4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-cross-headers4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-debug4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-debug-core4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-debug-devel4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-debug-modules4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-devel4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-doc4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-headers4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-modules4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-modules-extra4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-rt4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-core4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-debug4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-debug-core4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-debug-kvm4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-devel4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-kvm4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-modules4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.22.1.rt7.363.el8_10ALSA-2024:7001
AlmaLinux:8kernel-tools4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-tools-libs4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-zfcpdump4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8perf4.18.0-553.22.1.el8_10ALSA-2024:7000
AlmaLinux:8python3-perf4.18.0-553.22.1.el8_10ALSA-2024:7000
Debian:12linux5.15.15-1DEBIAN-CVE-2021-47101
Debian:13linux5.15.15-1DEBIAN-CVE-2021-47101
Debian:14linux5.15.15-1DEBIAN-CVE-2021-47101
Rocky Linux:8kernel0:4.18.0-553.22.1.el8_10RLSA-2024:7000
Rocky Linux:8kernel-rt0:4.18.0-553.22.1.rt7.363.el8_10RLSA-2024:7001
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47101
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47101
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47101

Affected products (as reported)

VendorProductVersions
Linux Linux d9fe64e511144c1ee7d7555b4111f09dde9692ef – before d259f621c85949f30cc578cac813b82bb5169f56d9fe64e511144c1ee7d7555b4111f09dde9692ef – before 8035b1a2a37a29d8c717ef84fca8fe7278bc9f03
Linux Linux 4.9

References