Riskcovery

CVE-2021-47289

ACPI: fix NULL pointer dereference

State
Published
Severity
Not scored
Published
May 21, 2024
Updated
May 11, 2026
Reserved
May 21, 2024

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • fe066621c7966fe47fa17c6be6fd81adb3c0509f to before 38f54217b423c0101d03a00feec6fb8ec608b12eAffected
  • fe066621c7966fe47fa17c6be6fd81adb3c0509f to before cae3fa3d8165761f3000f523b11cfa1cd35206bcAffected
  • fe066621c7966fe47fa17c6be6fd81adb3c0509f to before ccf23a0888077a25a0793a746c3941db2a7562e4Affected
  • fe066621c7966fe47fa17c6be6fd81adb3c0509f to before fc68f42aa737dc15e7665a4101d4168aadb8e4c4Affected
LinuxLinux
  • 5.2Affected
  • before 5.2Not affected
  • 5.4.139 through 5.4.*Not affected
  • 5.10.57 through 5.10.*Not affected
  • 5.13.6 through 5.13.*Not affected
  • 5.14 and laterNot affected

References

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