Memory disclosure via embedded-font out-of-bounds read
Published Aug 10, 2023 · Updated May 28, 2026
Out-of-bounds read in affected Adobe Acrobat Reader releases allows attackers to disclose process memory via a crafted font file. The embedded-font parser inadequately validates user-supplied data before reading past the end of an allocated object. Exploitation requires a victim to open a malicious file or visit a malicious page; disclosed memory can weaken ASLR and support a separate code-execution exploit.
Summary
What happened
Out-of-bounds read in affected Adobe Acrobat Reader releases allows attackers to disclose process memory via a crafted font file. The embedded-font parser inadequately validates user-supplied data before reading past the end of an allocated object. Exploitation requires a victim to open a malicious file or visit a malicious page; disclosed memory can weaken ASLR and support a separate code-execution exploit.
The record
- CVE
- CVE-2023-38236
- Published
- Aug 10, 2023
- Updated
- May 28, 2026
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-125, T1204.002
- 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
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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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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