CVE-2026-41681— rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check
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I. Basic Information for CVE-2026-41681
Vulnerability Information
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Vulnerability Title
rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check
Source: NVD (National Vulnerability Database)
Vulnerability Description
rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.39 to before 0.10.78, EVP_DigestFinal() always writes EVP_MD_CTX_size(ctx) to the out buffer. If out is smaller than that, MdCtxRef::digest_final() writes past its end, usually corrupting the stack. This is reachable from safe Rust. This vulnerability is fixed in 0.10.78.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
rust-openssl 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rust-openssl是rust-openssl开源的一个用于与 OpenSSL 库进行交互的库。 rust-openssl 0.10.39版本至0.10.78之前版本存在安全漏洞，该漏洞源于EVP_DigestFinal函数始终写入EVP_MD_CTX_size字节到输出缓冲区，当输出缓冲区小于该值时导致缓冲区溢出，通常破坏堆栈。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| rust-openssl | rust-openssl | >= 0.10.39, < 0.10.78 | - |
II. Public POCs for CVE-2026-41681
| # | POC Description | Source Link | Shenlong Link |
|---|
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- Release openssl-v0.10.78 · rust-openssl/rust-openssl · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-41681
Same Patch Batch · rust-openssl · 2026-04-24 · 5 CVEs total
| CVE-2026-41678 | rust-openssl: Incorrect bounds assertion in aes key wrap | |
| CVE-2026-41676 | rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL | |
| CVE-2026-41677 | rust-openssl: Out-of-bounds read in PEM password callback when user callback returns an ov | |
| CVE-2026-41898 | rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines ca |
IV. Related Vulnerabilities
Same product: rust-openssl
- CVE-2026-41898
rust-openssl: Unchecked callback-returned length in PSK and - CVE-2026-41678
rust-openssl: Incorrect bounds assertion in aes key wrap - CVE-2026-41677
rust-openssl: Out-of-bounds read in PEM password callback wh - CVE-2026-41676
rust-openssl: Deriver::derive and PkeyCtxRef::derive can ove - CVE-2025-24898
rust openssl ssl::select_next_proto use after free
Same vendor: rust-openssl
Same weakness: CWE-121
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Squirrel sqstdstring.cpp validate_format stack-based overflo - CVE-2026-8234
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Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
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V. Comments for CVE-2026-41681
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