Stack-based buffer overflow in rust-openssl - CVE-2026-41681

Vulnerability identifier: #VU126495

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-41681

CWE-ID: CWE-121

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause memory corruption.

The vulnerability exists due to a stack-based buffer overflow in MdCtxRef::digest_final() when processing a caller-supplied output buffer. A remote attacker can trigger the function with an undersized output buffer to cause memory corruption.

This issue is reachable from safe Rust.

rust-openssl
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Fedora
Public Cloud Module
Python 3 Module
Development Tools Module
openSUSE Leap
rust-eif_build
rust-ingredients
keylime-agent-rust
rust-keylime-debuginfo
rust-keylime
rust-oo7-cli
rust-cargo-vendor-filterer
rust-openssl-sys
rust-openssl
rust-rpki
rust-nu
python311-maturin
aws-nitro-enclaves-cli-debuginfo
aws-nitro-enclaves-cli
aws-nitro-enclaves-cli-debugsource
system-group-ne
aws-nitro-enclaves-binaryblobs-upstream
aws-nitro-enclaves-binaryblobs-upstream-debuginfo
rust-tealdeer
rustup-debugsource
rustup-debuginfo
rustup
python311-cryptography

Install security update from vendor's website.

rust-openssl - update to 0.10.78
rust-eif_build - addressed in versions 0.2.1-7.el9, 0.2.1-7.fc43, 0.2.1-7.fc44
rust-ingredients - update to 0.2.2-4.fc43
keylime-agent-rust - addressed in versions 0.2.9-2.fc43, 0.2.9-2.fc44
rust-keylime-debuginfo - addressed in versions 0.2.9+49-150400.3.19.1, 0.2.9+49-150400.3.21.1, 0.2.9+49-150500.3.19.1
rust-keylime - addressed in versions 0.2.9+49-150400.3.19.1, 0.2.9+49-150400.3.21.1, 0.2.9+49-150500.3.19.1
rust-oo7-cli - update to 0.4.3-5.fc44
rust-cargo-vendor-filterer - addressed in versions 0.5.18-5.el9, 0.5.18-5.el10_2, 0.5.18-5.el10_3, 0.5.18-5.fc43, 0.5.18-5.fc44
rust-openssl-sys - addressed in versions 0.9.114-1.el9, 0.9.114-1.el10_2, 0.9.114-1.el10_3, 0.9.114-1.fc42, 0.9.114-1.fc43, 0.9.114-1.fc44, 0.9.114-1.fc45
rust-openssl - addressed in versions 0.10.78-1.el9, 0.10.78-1.el10_2, 0.10.78-1.el10_3, 0.10.78-1.fc42, 0.10.78-1.fc43, 0.10.78-1.fc44, 0.10.78-1.fc45
rust-rpki - addressed in versions 0.18.6-4.el9, 0.18.6-4.el10_2, 0.18.6-4.el10_3, 0.18.6-4.fc43, 0.18.6-4.fc44
rust-nu - addressed in versions 0.99.1-17.el9, 0.99.1-17.fc43, 0.99.1-17.fc44
python311-maturin - update to 1.4.0-150600.3.15.1
aws-nitro-enclaves-cli-debuginfo - update to 1.4.5~git0.18a5f6f-150600.10.12.1
aws-nitro-enclaves-cli - update to 1.4.5~git0.18a5f6f-150600.10.12.1
aws-nitro-enclaves-cli-debugsource - update to 1.4.5~git0.18a5f6f-150600.10.12.1
system-group-ne - update to 1.4.5~git0.18a5f6f-150600.10.12.1
aws-nitro-enclaves-binaryblobs-upstream - update to 1.4.5~git0.18a5f6f-150600.10.12.1
aws-nitro-enclaves-binaryblobs-upstream-debuginfo - update to 1.4.5~git0.18a5f6f-150600.10.12.1
rust-tealdeer - addressed in versions 1.7.3-2.fc43, 1.7.3-2.fc44
rustup-debugsource - update to 1.28.2~0-150600.10.13.1
rustup-debuginfo - update to 1.28.2~0-150600.10.13.1
rustup - update to 1.28.2~0-150600.10.13.1
rustup - addressed in versions 1.29.0-4.fc43, 1.29.0-4.fc44
python311-cryptography - addressed in versions 41.0.3-150400.16.25.1, 41.0.3-150600.23.9.1

• https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-ghm9-cr32-g9qj

• Multiple vulnerabilities in rust-openssl
• Fedora 45 update for rust-openssl, rust-openssl-sys
• Fedora 44 update for rust-openssl, rust-openssl-sys
• Fedora 43 update for rust-openssl, rust-openssl-sys
• Fedora 42 update for rust-openssl, rust-openssl-sys
• Fedora EPEL 10.3 update for rust-openssl, rust-openssl-sys
• Fedora EPEL 10.2 update for rust-openssl, rust-openssl-sys
• Fedora EPEL 9 update for rust-openssl, rust-openssl-sys
• Fedora 43 update for rust-ingredients
• Fedora 44 update for rust-oo7-cli
• Fedora 44 update for rust-tealdeer
• Fedora 43 update for rust-tealdeer
• Fedora EPEL 9 update for rust-eif_build
• Fedora 43 update for rust-eif_build
• Fedora 44 update for rust-eif_build
• Fedora EPEL 10.3 update for rust-cargo-vendor-filterer
• Fedora 44 update for rust-cargo-vendor-filterer
• Fedora EPEL 10.2 update for rust-cargo-vendor-filterer
• Fedora EPEL 9 update for rust-cargo-vendor-filterer
• Fedora 43 update for rust-cargo-vendor-filterer
• Fedora 44 update for keylime-agent-rust
• Fedora 43 update for keylime-agent-rust
• Fedora EPEL 9 update for rust-rpki
• Fedora 44 update for rust-rpki
• Fedora EPEL 10.3 update for rust-rpki
• Fedora EPEL 10.2 update for rust-rpki
• Fedora 43 update for rust-rpki
• Fedora 43 update for rustup
• Fedora 44 update for rustup
• Fedora EPEL 9 update for rust-nu
• Fedora 43 update for rust-nu
• Fedora 44 update for rust-nu
• SUSE update for rust-keylime
• SUSE update for python-maturin
• SUSE update for rust-keylime
• SUSE update for rust-keylime
• SUSE update for rustup
• SUSE update for python-cryptography
• SUSE update for python-cryptography
• SUSE update for aws-nitro-enclaves-cli