Sensitive memory disclosure via font parsing
Published Aug 10, 2023 · Updated May 28, 2026
Out-of-bounds read in Adobe Acrobat Reader 23.003.20244 and earlier allows attackers to disclose sensitive memory from a malicious file. The font parser reads beyond a buffer boundary while processing crafted font data, although Adobe has not disclosed the exact routine or malformed field. Opening the file is required; leaked addresses can weaken ASLR, and Classic 2020 20.005.30467 and earlier is also affected.
Summary
What happened
Out-of-bounds read in Adobe Acrobat Reader 23.003.20244 and earlier allows attackers to disclose sensitive memory from a malicious file. The font parser reads beyond a buffer boundary while processing crafted font data, although Adobe has not disclosed the exact routine or malformed field. Opening the file is required; leaked addresses can weaken ASLR, and Classic 2020 20.005.30467 and earlier is also affected.
The record
- CVE
- CVE-2023-38235
- Published
- Aug 10, 2023
- Updated
- May 28, 2026
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 10, 2023CVE publishedPublication date reported by the CVE source.
- May 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=23.003.20244
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo