CVE-2026-41898
HIGHDescription
rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.24 to before 0.10.78, the FFI trampolines behind SslContextBuilder::set_psk_client_callback, set_psk_server_callback, set_cookie_generate_cb, and set_stateless_cookie_generate_cb forwarded the user closure's returned usize directly to OpenSSL without checking it against the &mut [u8] that was handed to the closure. This can lead to buffer overflows and other unintended consequences. This vulnerability is fixed in 0.10.78.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 21% of all known CVEs.
References
Related Vulnerabilities
Other CWE-126 (Buffer Over-read) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-49285 | High | 8.6 | 88% | - | Fix |
| CVE-2017-7668 | High | 7.5 | 57% | - | Fix |
| CVE-2017-7679 | Critical | 9.8 | 39% | - | Fix |
| CVE-2025-21277 | High | 7.5 | 39% | - | Fix |
| CVE-2024-38071 | High | 7.5 | 36% | - | Fix |
| CVE-2009-2495 | Medium | 6.5 | 34% | - | - |
Common questions
How do I fix CVE-2026-41898?
Upgrade rust-openssl on debian unstable to 0.10.78-1 or later.
Is CVE-2026-41898 being actively exploited?
Not that we know of. CVE-2026-41898 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.28% is the estimated probability that it will be exploited in the next 30 days. That is higher than 21% of all scored CVEs.
How severe is CVE-2026-41898?
CVE-2026-41898 has a CVSS v3 base score of 5.3, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-41898 affect?
Published advisories record a fix for rust-openssl (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-15.