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Fencer Vulns
medium 5.0

CVE-2023-38538 json

A race condition in an event subsystem led to a heap use-after-free issue in established audio/video calls that could have resulted in app…

published 2023-10-04 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-42337

cvss
5.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

A race condition in an event subsystem led to a heap use-after-free issue in established audio/video calls that could have resulted in app termination or unexpected control flow with very low probability.

Patch / fix

  • Facebook WhatsApp Desktop for Mac 2.2338.12
  • Facebook WhatsApp Desktop for Windows 2.2320.2
  • Facebook WhatsApp Business for iOS 2.23.10.77
  • Facebook WhatsApp for iOS 2.23.10.77
  • Facebook WhatsApp Business for Android 2.23.10.77
  • Facebook WhatsApp for Android 2.23.10.77

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C
CNA 3.1 5.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
NVD 3.1 5.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

Affected products

  • Facebook WhatsApp Desktop for Mac
  • Facebook WhatsApp Desktop for Windows
  • Facebook WhatsApp Business for iOS
  • Facebook WhatsApp for iOS
  • Facebook WhatsApp Business for Android
  • Facebook WhatsApp for Android

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.