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TI-2026-30300 Aliases CVE-2026-41898GHSA-hppc-g8h3-xhp3

rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines…

Priority LOW 36CWE-126Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0028 20th 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
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
rust-opensslrust-openssl0.9.24 to before 0.10.780.10.78Patch availableCNA
—openssl (crates.io)0.9.24 to before 0.10.780.10.78Patch availableGHSA-hppc-g8h3-xhp3
  • rust-openssl Vendorrust-openssl Affected 0.9.24 to before 0.10.78 Fixed in 0.10.78 Patch available CNA
  • openssl (crates.io) Vendor— Affected 0.9.24 to before 0.10.78 Fixed in 0.10.78 Patch available GHSA-hppc-g8h3-xhp3

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:rust:*:*0.9.24 to before 0.10.78Vulnerablerust-openssl
  • cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:rust:*:* Versions 0.9.24 to before 0.10.78 Vulnerable ·rust-openssl

Remediation

  • Fix · CNA rust-openssl (rust-openssl) Fixed in 0.10.78
  • Fix · GHSA-hppc-g8h3-xhp3 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

  1. 2026-10-02 Threatist record created from CVE-2026-41898
  2. 2026-10-03 Alias added: GHSA-hppc-g8h3-xhp3

References

Patch 1

Advisory 2

Other 3

  • 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-2026-30195 rust-openssl: Incorrect bounds assertion in aes key wrap CVSS 4.0HIGH 7.2
  • 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences