CVE-2021-47289
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…
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12ePatch
- https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bcPatch
- https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4Patch
- https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4Patch
- https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12ePatch
- https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bcPatch
- https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4Patch
- https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.