TI-2026-30195 Aliases CVE-2026-41678 GHSA-8c75-8mhr-p7r9

rust-openssl: Incorrect bounds assertion in aes key wrap

LOW 33CWE-787Published 2026-04-24 · Updated 2026-04-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-787 and the CVSS impact.

Summary

rust-openssl provides OpenSSL bindings for the Rust programming language. From to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 <= in_.len(), but this condition is reversed. The intended invariant is out.len() >= in_.len() - 8, ensuring the output buffer is large enough. Because of the inverted check, the function only accepts buffers at or below the minimum required size and rejects larger ones. If a smaller buffer is provided the function will write past the end of out by in_.len() - 8 - out.len() bytes, causing an out-of-bounds write from a safe public function. This vulnerability is fixed in 0.10.78.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00251 16th percentileScored 2026-11-07

Fix Fixed rust-openssl (rust-openssl): 0.10.78openssl (crates.io): 0.10.78

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
rust-openssl	rust-openssl	0.10.24 to before 0.10.78	0.10.78	Patch available	CNA
—	openssl (crates.io)	0.10.24 to before 0.10.78	0.10.78	Patch available	GHSA-8c75-8mhr-p7r9

rust-openssl Vendorrust-openssl Affected 0.10.24 to before 0.10.78 Fixed in 0.10.78 Patch available CNA
openssl (crates.io) Vendor— Affected 0.10.24 to before 0.10.78 Fixed in 0.10.78 Patch available GHSA-8c75-8mhr-p7r9

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:rust-openssl_project:rust-openssl::::::rust::*	0.10.24 to before 0.10.78	Vulnerable	rust-openssl

cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:rust:*:* Versions 0.10.24 to before 0.10.78 Vulnerable ·rust-openssl

Remediation

Fix · CNA rust-openssl (rust-openssl) Fixed in 0.10.78
Fix · GHSA-8c75-8mhr-p7r9 openssl (crates.io) Fixed in 0.10.78 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-41678
2026-10-03 Alias added: GHSA-8c75-8mhr-p7r9

References

Advisory 2

Other 4

TI-2018-14959 An issue was discovered in the openssl crate before 0.10.9 for Rust. CVSS 3.0CRITICAL 9.8
TI-2026-30198 rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check CVSS 4.0HIGH 8.1
TI-2026-30193 rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1 CVSS 4.0HIGH 7.2
TI-2016-08969 An issue was discovered in the openssl crate before 0.9.0 for Rust. CVSS 3.0HIGH 8.1
TI-2026-30300 rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines… CVSS 4.0HIGH 8.3
TI-2026-30194 rust-openssl: Out-of-bounds read in PEM password callback when user callback returns an oversized length CVSS 4.0LOW 1.7

Sources

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