7.8

CVE-2023-52840: linux Use After Free

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2023-52840DEBIAN-CVE-2023-52840
Published 21-05-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-52840 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 13
RHSA-2024:7000RHSA-2024:7001RHSA-2024:9315RHSA-2025:8248SUSE-SU-2024:2008-1SUSE-SU-2024:2010-1

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: Input: synaptics-rmi4 - fix use after free in rmi_unregister_function() The put_device() calls rmi_release_function() which frees "fn" so the dereference on the next line "fn->num_of_irqs" is a use after free. Move the put_device() to the end to fix this.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu112 products
  • linux< 5.4.0-173.191 | < 5.15.0-100.110
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 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≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < 2f236d8638f5b43e0c72919a6a27fe286c32053f | ≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < 50d12253666195a14c6cd2b81c376e2dbeedbdff | ≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < 6c71e065befb2fae8f1461559b940c04e1071bd5 | ≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < 303766bb92c5c225cf40f9bbbe7e29749406e2f2 | ≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < 7082b1fb5321037bc11ba1cf2d7ed23c6b2b521f | ≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < cc56c4d17721dcb10ad4e9c9266e449be1462683 | ≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < c8e639f5743cf4b01f8c65e0df075fe4d782b585 | ≥ 24d28e4f1271cb2f91613dada8f2acccd00eff56, < eb988e46da2e4eae89f5337e047ce372fe33d5b1 | 4.18
  • linux_kernel≥ 4.18, < 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 · 115 products

References

12 links
Show all 12 references