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

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Main Vulnerability Database Vulnerabilities #VU126495

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

Published: April 20, 2026


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

Vulnerability details

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.


Affected software

rust-openssl
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Fedora
Public Cloud Module
Confidential Computing Module
Development Tools Module
Server Applications Module
Python 3 Module
openSUSE Leap
Bob
rust-eif_build
rust-ingredients
keylime-agent-rust
rust-keylime-debuginfo
rust-keylime
rust-oo7-cli
rust-cargo-vendor-filterer
snphost-debuginfo
snphost
snphost-debugsource
rust-openssl-sys
snpguest-debugsource
snpguest
snpguest-debuginfo
rust-openssl
rust-rpki
rust-nu
python311-maturin
aws-nitro-enclaves-binaryblobs-upstream-debuginfo
aws-nitro-enclaves-cli-debuginfo
aws-nitro-enclaves-cli
aws-nitro-enclaves-cli-debugsource
system-group-ne
aws-nitro-enclaves-binaryblobs-upstream
rust-tealdeer
rustup-debugsource
rustup-debuginfo
rustup
pam-himmelblau
himmelblau-debuginfo
libnss_himmelblau2
himmelblau
himmelblau-qr-greeter
himmelblau-sso-debuginfo
himmelblau-sso
himmelblau-sshd-config
python311-cryptography

How to mitigate CVE-2026-41681

Install security update from vendor's website.

rust-openssl - update to 0.10.78
Bob - update to 2.0
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
snphost-debuginfo - update to 0.6.1-150700.3.6.1
snphost - update to 0.6.1-150700.3.6.1
snphost-debugsource - update to 0.6.1-150700.3.6.1
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
snpguest-debugsource - update to 0.10.0-150700.3.6.1
snpguest - update to 0.10.0-150700.3.6.1
snpguest-debuginfo - update to 0.10.0-150700.3.6.1
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-binaryblobs-upstream-debuginfo - update to 1.4.5~git0.18a5f6f-150600.10.12.1
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
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
pam-himmelblau - update to 2.3.14+git0.e23b4c54-150500.11.12.1
himmelblau-debuginfo - update to 2.3.14+git0.e23b4c54-150500.11.12.1
libnss_himmelblau2 - update to 2.3.14+git0.e23b4c54-150500.11.12.1
himmelblau - update to 2.3.14+git0.e23b4c54-150500.11.12.1
himmelblau-qr-greeter - update to 2.3.14+git0.e23b4c54-150500.11.12.1
himmelblau-sso-debuginfo - update to 2.3.14+git0.e23b4c54-150500.11.12.1
himmelblau-sso - update to 2.3.14+git0.e23b4c54-150500.11.12.1
himmelblau-sshd-config - update to 2.3.14+git0.e23b4c54-150500.11.12.1
python311-cryptography - addressed in versions 41.0.3-150400.16.25.1, 41.0.3-150600.23.9.1

External References

Related Security Bulletins