Out-of-bounds write in rust-openssl - CVE-2026-41676

Vulnerability identifier: #VU126498

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-41676

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a buffer overflow.

The vulnerability exists due to a heap/stack overflow in Deriver::derive and PkeyCtxRef::derive when deriving shared secrets into a caller-supplied buffer on OpenSSL 1.1.x. A remote attacker can provide or trigger use of a short buffer to cause a buffer overflow.

Only OpenSSL 1.1.x is affected; OpenSSL 3.x providers check the buffer length.

rust-openssl
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Proxy
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
Fedora
Public Cloud Module
Development Tools Module
Python 3 Module
Basesystem Module
openSUSE Leap
Bob
ClamAV
rust-eif_build
rust-ingredients
keylime-agent-rust
rust-keylime-debuginfo
rust-keylime
sccache-debugsource
sccache-debuginfo
sccache
rust-oo7-cli
rust-cargo-vendor-filterer
rust-openssl-sys
rust-openssl
rust-rpki
rust-nu
python311-maturin
libclammspack0-debuginfo
libclamav12
libfreshclam4-debuginfo
clamav-devel
clamav-debuginfo
libclamav12-debuginfo
clamav-milter
clamav
clamav-milter-debuginfo
clamav-debugsource
libfreshclam4
libclammspack0
clamav-docs-html
rust-tealdeer
rustup-debugsource
rustup-debuginfo
rustup
himmelblau-sshd-config
himmelblau-sso
himmelblau-sso-debuginfo
pam-himmelblau
himmelblau-qr-greeter
himmelblau
himmelblau-debuginfo
libnss_himmelblau2
cryptsetup-debuginfo
cryptsetup
libcryptsetup12-32bit-debuginfo
libcryptsetup12-32bit
cryptsetup-doc
cryptsetup-ssh-debuginfo
libcryptsetup12-debuginfo
cryptsetup-debugsource
libcryptsetup12
cryptsetup-lang
cryptsetup-ssh
libcryptsetup-devel
libkmipclient1-devel
s390-tools-chreipl-fcp-mpath
libekmfweb1
libkmipclient1
s390-tools-hmcdrvfs
osasnmpd
libekmfweb1-debuginfo
osasnmpd-debuginfo
s390-tools-zdsfs
s390-tools-genprotimg-data
s390-tools-debugsource
s390-tools-debuginfo
s390-tools
libekmfweb1-devel
s390-tools-zdsfs-debuginfo
s390-tools-hmcdrvfs-debuginfo
libkmipclient1-debuginfo
python311-cryptography

Install security update from vendor's website.

rust-openssl - update to 0.10.78
Bob - update to 2.0
ClamAV - addressed in versions 1.4.5, 1.5.3
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
sccache-debugsource - update to 0.4.2~4-150400.3.12.1
sccache-debuginfo - update to 0.4.2~4-150400.3.12.1
sccache - update to 0.4.2~4-150400.3.12.1
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
libclammspack0-debuginfo - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
libclamav12 - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
libfreshclam4-debuginfo - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
clamav-devel - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
clamav-debuginfo - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
libclamav12-debuginfo - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
clamav-milter - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
clamav - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
clamav-milter-debuginfo - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
clamav-debugsource - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
libfreshclam4 - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
libclammspack0 - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
clamav-docs-html - addressed in versions 1.5.3-3.56.1, 1.5.3-150400.13.8.1, 1.5.3-150600.18.28.1
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
himmelblau-sshd-config - 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-sso-debuginfo - update to 2.3.14+git0.e23b4c54-150500.11.12.1
pam-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 - 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
cryptsetup-debuginfo - update to 2.8.4-150700.6.4.4
cryptsetup - update to 2.8.4-150700.6.4.4
libcryptsetup12-32bit-debuginfo - update to 2.8.4-150700.6.4.4
libcryptsetup12-32bit - update to 2.8.4-150700.6.4.4
cryptsetup-doc - update to 2.8.4-150700.6.4.4
cryptsetup-ssh-debuginfo - update to 2.8.4-150700.6.4.4
libcryptsetup12-debuginfo - update to 2.8.4-150700.6.4.4
cryptsetup-debugsource - update to 2.8.4-150700.6.4.4
libcryptsetup12 - update to 2.8.4-150700.6.4.4
cryptsetup-lang - update to 2.8.4-150700.6.4.4
cryptsetup-ssh - update to 2.8.4-150700.6.4.4
libcryptsetup-devel - update to 2.8.4-150700.6.4.4
libkmipclient1-devel - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1
s390-tools-chreipl-fcp-mpath - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
libekmfweb1 - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
libkmipclient1 - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools-hmcdrvfs - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
osasnmpd - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
libekmfweb1-debuginfo - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
osasnmpd-debuginfo - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools-zdsfs - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools-genprotimg-data - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools-debugsource - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools-debuginfo - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
libekmfweb1-devel - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools-zdsfs-debuginfo - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
s390-tools-hmcdrvfs-debuginfo - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
libkmipclient1-debuginfo - addressed in versions 2.31.0-150400.7.34.1, 2.31.0-150500.9.32.1, 2.41.0-150700.4.26.2
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-pqf5-4pqq-29f5

• 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
• Multiple vulnerabilities in ClamAV
• SUSE update for cryptsetup, s390-tools
• 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 clamav
• SUSE update for clamav
• SUSE update for clamav
• SUSE update for sccache
• SUSE update for python-cryptography
• SUSE update for python-cryptography
• SUSE update for s390-tools
• SUSE update for s390-tools
• SUSE update for himmelblau, himmelblau.SUSE_SLE-15-SP5_Update
• Multiple vulnerabilities in IBM Bob