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Vulnerability · Published Feb 26, 2024 · Assigned by Linux

CVE-2021-46906HID: usbhid: fix info leak in hid_submit_ctrl

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 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 84.2% 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: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.14.6-1DEBIAN-CVE-2021-46906
Debian:13linux5.14.6-1DEBIAN-CVE-2021-46906
Debian:14linux5.14.6-1DEBIAN-CVE-2021-46906
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-46906
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-46906
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-46906

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before c5d3c142f2d57d40c55e65d5622d319125a453661da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 41b1e71a2c57366b08dcca1a28b0d45ca69429ce1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 8c064eece9a51856f3f275104520c7e3017fc5c01da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 0e280502be1b003c3483ae03fc60dea554fcfa821da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f11da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before b1e3596416d74ce95cc0b7b38472329a3818f8a91da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 21883bff0fd854e07429a773ff18f1e9658f50e81da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 6be388f4a35d2ce5ef7dbf635a8964a5da7f799f
Linux Linux 2.6.12

References