CVE-2021-47289: ACPI: fix NULL pointer dereference
First published: Tue May 21 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.4.139 | 5.4.139 |
| redhat/kernel | <5.10.57 | 5.10.57 |
| redhat/kernel | <5.13.6 | 5.13.6 |
| redhat/kernel | <5.14 | 5.14 |
| Linux kernel | <5.4.139 | |
| Linux kernel | >=5.5<5.10.57 | |
| Linux kernel | >=5.11<5.13.6 | |
| Linux kernel | =5.14-rc1 | |
| Linux kernel | =5.14-rc2 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2021-47289
- https://lore.kernel.org/linux-cve-announce/2024052122-CVE-2021-47289-7cbb@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://bugzilla.redhat.com/show_bug.cgi?id=2282508
- https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e
- https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc
- https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4
- https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-47289?
CVE-2021-47289 is classified as a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2021-47289?
You should apply the appropriate patches provided by your Linux distribution.
What systems are affected by CVE-2021-47289?
CVE-2021-47289 affects various versions of the Linux kernel, particularly those before the fixed versions mentioned.
What could happen if CVE-2021-47289 is exploited?
Exploitation of CVE-2021-47289 could lead to a NULL pointer dereference which may result in system crashes.
Is CVE-2021-47289 publicly known?
Yes, CVE-2021-47289 is a publicly disclosed vulnerability in the Linux kernel.
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