CVE-2021-47289

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfe066621c7966fe47fa17c6be6fd81adb3c0509f < 38f54217b423c0101d03a00feec6fb8ec608b12eaffected
LinuxLinuxfe066621c7966fe47fa17c6be6fd81adb3c0509f < cae3fa3d8165761f3000f523b11cfa1cd35206bcaffected
LinuxLinuxfe066621c7966fe47fa17c6be6fd81adb3c0509f < ccf23a0888077a25a0793a746c3941db2a7562e4affected
LinuxLinuxfe066621c7966fe47fa17c6be6fd81adb3c0509f < fc68f42aa737dc15e7665a4101d4168aadb8e4c4affected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.4.139 <= 5.4.*unaffected
LinuxLinux5.10.57 <= 5.10.*unaffected
LinuxLinux5.13.6 <= 5.13.*unaffected
LinuxLinux5.14 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References