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Vulnerability · Published Feb 27, 2024 · Assigned by Linux

CVE-2021-46932Input: appletouch - initialize work before device registration

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

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 86.3% 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: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.15-1DEBIAN-CVE-2021-46932
Debian:13linux5.15.15-1DEBIAN-CVE-2021-46932
Debian:14linux5.15.15-1DEBIAN-CVE-2021-46932
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-46932
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-46932
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-46932

Affected products (as reported)

VendorProductVersions
Linux Linux 5a6eb676d3bc4d7a6feab200a92437b62ad298da – before d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f45a6eb676d3bc4d7a6feab200a92437b62ad298da – before d1962f263a176f493400b8f91bfbf2bfedce951e5a6eb676d3bc4d7a6feab200a92437b62ad298da – before 292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f5a6eb676d3bc4d7a6feab200a92437b62ad298da – before a02e1404e27855089d2b0a0acc4652c2ce65fe465a6eb676d3bc4d7a6feab200a92437b62ad298da – before 975774ea7528b489930b76a77ffc4d5379b95ff25a6eb676d3bc4d7a6feab200a92437b62ad298da – before 9f329d0d6c91142cf0ad08d23c72dd195db2633c5a6eb676d3bc4d7a6feab200a92437b62ad298da – before e79ff8c68acb1eddf709d3ac84716868f2a910125a6eb676d3bc4d7a6feab200a92437b62ad298da – before 9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0
Linux Linux 2.6.23

References