Loading...
Skip to main content
GeekWala

CVE-2026-41898

HIGH

rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer

Published April 22, 2026Updated May 6, 2026Source: osv

Summary

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.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update openssl to 0.10.78 or later
cargo update -p openssl --precise 0.10.78

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

PackageEcosystemAffectedFixed In
openssl
crates.io
All versions0.10.78

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.6 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N

References

Frequently Asked Questions

What is CVE-2026-41898?
rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.6/10).
How do I check if my project is affected by CVE-2026-41898?
CVE-2026-41898 affects openssl. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-41898 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.6

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-hppc-g8h3-xhp3

Related CVEs

  • CVE-2016-10931
    HIGH

    SSL/TLS MitM vulnerability due to insecure defaults

  • CVE-2016-10931
    HIGH

    Improper Certificate Validation in openssl

  • CVE-2026-63135
    HIGH

    YOURLS has stored XSS in referrer statistics chart via crafted Referer header

  • CVE-2026-41678
    HIGH

    rust-openssl has incorrect bounds assertion in aes key wrap

  • CVE-2026-41681
    HIGH

    rust-openssl: rustMdCtxRef::digest_final() writes past caller buffer with no length check

  • CVE-2026-41676
    HIGH

    rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1

  • CVE-2026-42327
    HIGH

    rust-openssl has undefined behavior in X509Ref::ocsp_responders for certificates with non-UTF-8 OCSP URLs

  • CVE-2026-41677
    LOW

    rust-opennssl has an Out-of-bounds read in PEM password callback when returning an oversized length

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies