7.8

CVE-2023-52445: media: pvrusb2: fix use after free on context disconnection

Modified
AliasesUBUNTU-CVE-2023-52445DEBIAN-CVE-2023-52445
Published 22-02-2024Last modified 11-05-2026

Vulnerability summary

CVE-2023-52445 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 15.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, 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
0.24%
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 32 · Related 30
DLA-3840-1DLA-3841-1RHSA-2024:3618RHSA-2024:3627RHSA-2024:9315SUSE-SU-2024:0855-1

Timeline

  1. 22-02-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

16%

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.

Ubuntu116 products
  • linuxAll versions (No fix recorded) | < 4.4.0-253.287 | < 4.15.0-224.236 | < 5.4.0-176.196 | < 5.15.0-102.112
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1130.136 | < 4.4.0-1168.183 | < 4.15.0-1167.180 | < 5.4.0-1122.132 | < 5.15.0-1057.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e5be15c63804e05b5a94197524023702a259e308, < ec36c134dd020d28e312c2f1766f85525e747aab | ≥ e5be15c63804e05b5a94197524023702a259e308, < 47aa8fcd5e8b5563af4042a00f25ba89bef8f33d | ≥ e5be15c63804e05b5a94197524023702a259e308, < 3233d8bf7893550045682192cb227af7fa3defeb | ≥ e5be15c63804e05b5a94197524023702a259e308, < ec3634ebe23fc3c44ebc67c6d25917300bc68c08 | ≥ e5be15c63804e05b5a94197524023702a259e308, < 30773ea47d41773f9611ffb4ebc9bda9d19a9e7e | ≥ e5be15c63804e05b5a94197524023702a259e308, < 2cf0005d315549b8d2b940ff96a66c2a889aa795 | ≥ e5be15c63804e05b5a94197524023702a259e308, < 437b5f57732bb4cc32cc9f8895d2010ee9ff521c | ≥ e5be15c63804e05b5a94197524023702a259e308, < ded85b0c0edd8f45fec88783d7555a5b982449c1 | 2.6.26
  • linux_kernel< 4.19.306 | ≥ 4.20, < 5.4.268 | ≥ 5.5.0, < 5.10.209 | ≥ 5.11.0, < 5.15.148 | ≥ 5.16.0, < 6.1.75 | ≥ 6.2.0, < 6.6.14 | ≥ 6.7.0, < 6.7.2
Debian1 product
  • linux< 6.1.76-1 | < 6.6.15-1

3 vendors · 119 products

References

29 links
Show all 29 references