Heap corruption via undersized AES-KW-PAD output buffer
Published Jul 17, 2026 · Updated Jul 17, 2026
Out-of-bounds write in rust-openssl openssl 0.10.50 through 0.10.79 allows attackers to corrupt heap memory via crafted plaintext. CipherCtxRef::cipher_update_inplace validates an in-place buffer using input length plus block size instead of the larger padded key-wrap output size. Reachability requires an application to use an AES key-wrap-with-padding cipher with attacker-influenced plaintext whose length is not a multiple of eight; OpenSSL then writes up to seven bytes beyond the buffer.
Summary
What happened
Out-of-bounds write in rust-openssl openssl 0.10.50 through 0.10.79 allows attackers to corrupt heap memory via crafted plaintext. CipherCtxRef::cipher_update_inplace validates an in-place buffer using input length plus block size instead of the larger padded key-wrap output size. Reachability requires an application to use an AES key-wrap-with-padding cipher with attacker-influenced plaintext whose length is not a multiple of eight; OpenSSL then writes up to seven bytes beyond the buffer.
The record
- CVE
- CVE-2026-45784
- Published
- Jul 17, 2026
- Updated
- Jul 17, 2026
- Vendor
- rust-openssl
- Product
- openssl
- Classifications
- CWE-131, CWE-787
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 17, 2026CVE publishedPublication date reported by the CVE source.
- Jul 17, 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=>= 0.10.50, < 0.10.80
What conditions does exploitation require?
What is affected?
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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