ACPI: fix NULL pointer dereference (Linux Linux)

CVE-2021-47289
MEDIUM 5.5

At a glance

Source
NVD
EPSS
EPSS 0.24 % · percentile 15 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Analyzed

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.

Weaknesses (CWE)

  • CWE-476 — NULL Pointer Dereference

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected fe066621c7966fe47fa17c6be6fd81adb3c0509f < 38f54217b423c0101d03a00feec6fb8ec608b12e ; affected fe066621c7966fe47fa17c6be6fd81adb3c0509f < cae3fa3d8165761f3000f523b11cfa1cd35206bc ; affected fe066621c7966fe47fa17c6be6fd81adb3c0509f < ccf23a0888077a25a0793a746c3941db2a7562e4 ; affected fe066621c7966fe47fa17c6be6fd81adb3c0509f < fc68f42aa737dc15e7665a4101d4168aadb8e4c4
Linux · Linuxaffected 5.2 ; unaffected 0 < 5.2 ; unaffected 5.4.139 ≤ 5.4.* ; unaffected 5.10.57 ≤ 5.10.* ; unaffected 5.13.6 ≤ 5.13.* ; unaffected 5.14 ≤ *

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD