Vulnerabilities > CVE-2021-47289 - NULL Pointer Dereference vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: fix NULL pointer dereference Commit 71f642833284 ("ACPI: utils: Fix reference counting in for_each_acpi_dev_match()") started doing "acpi_dev_put()" on a pointer that was possibly NULL. That fails miserably, because that helper inline function is not set up to handle that case. Just make acpi_dev_put() silently accept a NULL pointer, rather than calling down to put_device() with an invalid offset off that NULL pointer.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e
- https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e
- https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc
- https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc
- https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4
- https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4
- https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4
- https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4