7.8

CVE-2023-52864: platform/x86: wmi: Fix opening of char device

Modified
AliasesUBUNTU-CVE-2023-52864DEBIAN-CVE-2023-52864
Published 21-05-2024Last modified 05-08-2026

Vulnerability summary

CVE-2023-52864 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.27%
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 20 · Related 13
RHSA-2024:5101RHSA-2024:5102RHSA-2024:5363RHSA-2024:5364RHSA-2024:5365RHSA-2024:5692

Timeline

  1. 21-05-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: wmi: Fix opening of char device Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via file private data"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices(). Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.27% 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.

Ubuntu115 products
  • linuxAll versions (No fix recorded) | < 5.4.0-173.191 | < 5.15.0-100.110
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1120.130 | < 5.15.0-1056.61
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < cf098e937dd125c0317a0d6f261ac2a950a233d6 | ≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < 9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203 | ≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < d426a2955e45a95b2282764105fcfb110a540453 | ≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < e0bf076b734a2fab92d8fddc2b8b03462eee7097 | ≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < 44a96796d25809502c75771d40ee693c2e44724e | ≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < 36d85fa7ae0d6be651c1a745191fa7ef055db43e | ≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < fb7b06b59c6887659c6ed0ecd3110835eecbb6a3 | ≥ 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9, < eba9ac7abab91c8f6d351460239108bef5e7a0b6 | 4.15
  • linux_kernel≥ 4.15, < 4.19.299 | ≥ 4.20, < 5.4.261 | ≥ 5.5, < 5.10.201 | ≥ 5.11, < 5.15.139 | ≥ 5.16, < 6.1.63 | ≥ 6.2, < 6.5.12 | ≥ 6.6, < 6.6.2
Debian1 product
  • linux< 6.1.64-1 | < 6.6.8-1

3 vendors · 118 products

References

12 links
Show all 12 references