CVE-2026-41678
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 0.10.78-1 |
| forky | Fixed | 0.10.78-1 |
| bullseye | Affected | — |
| bookworm | Affected | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| crates.io | openssl | >=0.10.24,<0.10.78 | 0.10.78 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| rust-openssl_project | rust-openssl | {"startIncluding":"0.10.24","endExcluding":"0.10.78"} | 0.10.78 |
References
- https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-8c75-8mhr-p7r9
- https://nvd.nist.gov/vuln/detail/CVE-2026-41678
- https://github.com/rust-openssl/rust-openssl/pull/2604
- https://github.com/rust-openssl/rust-openssl/commit/718d07ff8ff7be417d5b7a6a0047f1607520b3b6
- https://github.com/rust-openssl/rust-openssl
- https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78
- https://security-tracker.debian.org/tracker/CVE-2026-41678
CWEs
CWE-787
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.