5.5

CVE-2021-47289: ACPI: fix NULL pointer dereference

Analyzed
AliasesUBUNTU-CVE-2021-47289DEBIAN-CVE-2021-47289
Published 21-05-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47289 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 6
RHSA-2024:7000RHSA-2024:7001SUSE-SU-2024:2010-1SUSE-SU-2024:2183-1SUSE-SU-2024:2185-1SUSE-SU-2024:3189-1

Timeline

  1. 21-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu66 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ fe066621c7966fe47fa17c6be6fd81adb3c0509f, < 38f54217b423c0101d03a00feec6fb8ec608b12e | ≥ fe066621c7966fe47fa17c6be6fd81adb3c0509f, < cae3fa3d8165761f3000f523b11cfa1cd35206bc | ≥ fe066621c7966fe47fa17c6be6fd81adb3c0509f, < ccf23a0888077a25a0793a746c3941db2a7562e4 | ≥ fe066621c7966fe47fa17c6be6fd81adb3c0509f, < fc68f42aa737dc15e7665a4101d4168aadb8e4c4 | 5.2
  • linux_kernel< 5.4.139 | ≥ 5.5, < 5.10.57 | ≥ 5.11, < 5.13.6 | 5.14:rc1 | 5.14:rc2
Debian1 product
  • linux< 5.14.6-1

3 vendors · 69 products

References

8 links