Memory corruption via one-pass compression race
Published Mar 31, 2026 · Updated Mar 31, 2026
Out-of-bounds write in Sereal::Encoder 4.000 through 4.009_002 allows attackers to corrupt memory during Zstandard compression. The embedded pre-1.3.8 Zstandard one-pass compression code can race while writing into an undersized caller-supplied output buffer, placing bytes beyond its bounds. Exploitation requires an application to invoke the affected compression path with a buffer below the recommended size and win the timing window; the documented consequence is memory corruption.
Summary
What happened
Out-of-bounds write in Sereal::Encoder 4.000 through 4.009_002 allows attackers to corrupt memory during Zstandard compression. The embedded pre-1.3.8 Zstandard one-pass compression code can race while writing into an undersized caller-supplied output buffer, placing bytes beyond its bounds. Exploitation requires an application to invoke the affected compression path with a buffer below the recommended size and win the timing window; the documented consequence is memory corruption.
The record
- CVE
- CVE-2024-14031
- Published
- Mar 31, 2026
- Updated
- Mar 31, 2026
- Vendor
- Sereal
- Product
- Sereal::Encoder
- Classifications
- CWE-787, CWE-1395
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 31, 2026CVE publishedPublication date reported by the CVE source.
- Mar 31, 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=4.000 <=4.009_002
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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