CVE-2021-47289 (GCVE-0-2021-47289)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2025-12-18 11:36
VLAI?
Title
ACPI: fix NULL pointer dereference
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fe066621c7966fe47fa17c6be6fd81adb3c0509f , < 38f54217b423c0101d03a00feec6fb8ec608b12e (git)
Affected: fe066621c7966fe47fa17c6be6fd81adb3c0509f , < cae3fa3d8165761f3000f523b11cfa1cd35206bc (git)
Affected: fe066621c7966fe47fa17c6be6fd81adb3c0509f , < ccf23a0888077a25a0793a746c3941db2a7562e4 (git)
Affected: fe066621c7966fe47fa17c6be6fd81adb3c0509f , < fc68f42aa737dc15e7665a4101d4168aadb8e4c4 (git)
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    Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.4.139 , ≤ 5.4.* (semver)
Unaffected: 5.10.57 , ≤ 5.10.* (semver)
Unaffected: 5.13.6 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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