CVE-2023-44323

Browser crash via Jbig2 use-after-free

Published Oct 30, 2023 · Updated Aug 2, 2024

Use-after-free in Jbig2 PDF handling in Adobe Acrobat for Microsoft Edge 118.0.2088.46 and earlier allows attackers to crash the browser. The Jbig2 handling path accesses memory after its associated object has been freed; the affected function and lifetime transition are undisclosed. A victim must open a malicious PDF, and the published impact is limited to an application crash in the current user's context.

CVSS severity5.5
Medium
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Jbig2 PDF handling in Adobe Acrobat for Microsoft Edge 118.0.2088.46 and earlier allows attackers to crash the browser. The Jbig2 handling path accesses memory after its associated object has been freed; the affected function and lifetime transition are undisclosed. A victim must open a malicious PDF, and the published impact is limited to an application crash in the current user's context.

The record

CVE
CVE-2023-44323
Published
Oct 30, 2023
Updated
Aug 2, 2024
Vendor
Adobe
Product
Adobe Acrobat for Microsoft Edge
Classifications
CWE-416, T1499.004, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=118.0.2088.46

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Acrobat for Microsoft Edgeversion=0 <=118.0.2088.46

Published CVSS scores

5.5AdobeCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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