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203
security advisorycriticaldouble-freeMageia 9 PuTTY Critical Signature Failure Double Free CVE-2026-4115
Security update. Publication date: 15 Jun 2026 URL: https://advisories.mageia.org/MGASA-2026-0210.html Type: security Affected Mageia releases: 9 CVE: CVE-2026-4115 Description: ECDSA signature verification can be made to fail an assertion. Server can provoke a double free in RSA KEX code. Telnet session data is marked with trust sigils after authenticating to a proxy. PuTTY Ed25519 Signature ecc-ssh.c eddsa_verify signature verification. (CVE-2026-4115) References: - https://bugs.mageia.org/show_bug.cgi?id=35585 - https://www.openwall.com/lists/oss-security/2026/05/24/11 - https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html - https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/rsakex-double-free.html - https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/telnet-trust-sigil.html - https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/eddsa-overlarge-s.html - https://www.cve.org/CVERecord?id=CVE-2026-4115 SRPMS: - 9/core/putty-0.84-1.mga9 . Critical security update for Mageia 9 addressing multiple issues in PuTTY due to signature failures and memory errors.. Mageia security update, PuTTY vulnerabilities, ECDSA issues, critical security advisory. . Severity: Critical. LinuxSecurity.com Team
Jun 15, 2026
•Critical
Mageia
89
security advisoryfedoraupdateFedora 35: FEDORA-2022-bf58612696 Critical: Ecdsautils Signature Issue
Fixes CVE-2022-24884 (Improper Verification of ECDSA Signatures). In previous versions ecdsautils would erroneously accept all-zero signatures as valid. More information can be found here: https://github.com/freifunk-gluon/ecdsautils/security/advisories/GHSA-qhcg-9ffp-78pw. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2022-bf58612696 2022-05-16 02:04:05.714214 --------------------------------------------------------------------------------Name : ecdsautils Product : Fedora 35 Version : 0.4.1 Release : 1.fc35 URL : https://github.com/freifunk-gluon/ecdsautils Summary : Tiny collection of programs used for ECDSA (keygen, sign, verify) Description : This collection of ECDSA utilities can be used to sign and verify data in a simple manner. --------------------------------------------------------------------------------Update Information: Fixes CVE-2022-24884 (Improper Verification of ECDSA Signatures). In previous versions ecdsautils would erroneously accept all-zero signatures as valid. More information can be found here: https://github.com/freifunk-gluon/ecdsautils/security/advisories/GHSA-qhcg-9ffp-78pw --------------------------------------------------------------------------------ChangeLog: * Thu May 5 2022 Felix Kaechele - 0.4.1-1 - update to 0.4.1 - use new upstream URLs - drop patch now upstreamed - added libs and devel subpackages * Thu Jan 20 2022 Fedora Release Engineering - 0.3.2-18 - Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild --------------------------------------------------------------------------------References: [ 1 ] Bug #2082427 - CVE-2022-24884 ecdsautils: Improper Verification of ECDSA Signatures [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2082427 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade--advisory FEDORA-2022-bf58612696' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/security/ --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list --
May 15, 2022
•Critical
Fedora
98
security advisorymoderateRed HatRed Hat OpenShift 4.7.36 RHSA-2021:3930 Moderate: CoreOS Signature Issue
Red Hat OpenShift Container Platform release 4.7.36 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.7.. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: OpenShift Container Platform 4.7.36 security and bug fix update Advisory ID: RHSA-2021:3930-01 Product: Red Hat OpenShift Enterprise Advisory URL: https://access.redhat.com/errata/RHSA-2021:3930 Issue date: 2021-10-27 CVE Names: CVE-2021-20319 ==================================================================== 1. Summary: Red Hat OpenShift Container Platform release 4.7.36 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat OpenShift Container Platform 4.7 - noarch, ppc64le, s390x, x86_64 3. Description: Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.7.36. See the following advisory for the container images for this release: https://access.redhat.com/errata/RHBA-2021:3931 Security Fix(es): * coreos-installer: incorrect signature verification on gzip-compressed install images (CVE-2021-20319) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other relatedinformation, refer to the CVE page(s) listed in the References section. All OpenShift Container Platform 4.7 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift Console or the CLI oc command. Instructions for upgrading a cluster are available at - -between-minor.html#understanding-upgrade-channels_updating-cluster-between - -minor Bug Fix(es): * Placeholder bug for OCP 4.7.0 rpm release (BZ#2015779) 4. Solution: For OpenShift Container Platform 4.7 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.7/html/release_notes/ocp-4-7-release-notes Details on how to access this content are available at - -cli.html 5. Bugs fixed (https://bugzilla.redhat.com/): 2011862 - CVE-2021-20319 coreos-installer: incorrect signature verification on gzip-compressed install images 2015779 - Placeholder bug for OCP 4.7.0 rpm release 6. Package List: Red Hat OpenShift Container Platform 4.7: Source: cri-o-1.20.5-6.rhaos4.7.gitec973a2.el7.src.rpm x86_64: cri-o-1.20.5-6.rhaos4.7.gitec973a2.el7.x86_64.rpm cri-o-debuginfo-1.20.5-6.rhaos4.7.gitec973a2.el7.x86_64.rpm Red Hat OpenShift Container Platform4.7: Source: coreos-installer-0.8.0-4.rhaos4.7.el8.src.rpm cri-o-1.20.5-6.rhaos4.7.gitec973a2.el8.src.rpm ironic-images-15.2-20211013.1.el8.src.rpm openstack-ironic-python-agent-6.4.4-0.20210811101217.48ffbaa.el8.src.rpm noarch: ironic-images-15.2-20211013.1.el8.noarch.rpm ironic-images-all-15.2-20211013.1.el8.noarch.rpm ironic-images-ipa-ppc64le-15.2-20211013.1.el8.noarch.rpm ironic-images-ipa-x86_64-15.2-20211013.1.el8.noarch.rpm openstack-ironic-python-agent-6.4.4-0.20210811101217.48ffbaa.el8.noarch.rpm python3-ironic-python-agent-6.4.4-0.20210811101217.48ffbaa.el8.noarch.rpm ppc64le: coreos-installer-0.8.0-4.rhaos4.7.el8.ppc64le.rpm coreos-installer-bootinfra-0.8.0-4.rhaos4.7.el8.ppc64le.rpm coreos-installer-bootinfra-debuginfo-0.8.0-4.rhaos4.7.el8.ppc64le.rpm coreos-installer-debuginfo-0.8.0-4.rhaos4.7.el8.ppc64le.rpm coreos-installer-debugsource-0.8.0-4.rhaos4.7.el8.ppc64le.rpm cri-o-1.20.5-6.rhaos4.7.gitec973a2.el8.ppc64le.rpm cri-o-debuginfo-1.20.5-6.rhaos4.7.gitec973a2.el8.ppc64le.rpm cri-o-debugsource-1.20.5-6.rhaos4.7.gitec973a2.el8.ppc64le.rpm s390x: coreos-installer-0.8.0-4.rhaos4.7.el8.s390x.rpm coreos-installer-bootinfra-0.8.0-4.rhaos4.7.el8.s390x.rpm coreos-installer-bootinfra-debuginfo-0.8.0-4.rhaos4.7.el8.s390x.rpm coreos-installer-debuginfo-0.8.0-4.rhaos4.7.el8.s390x.rpm coreos-installer-debugsource-0.8.0-4.rhaos4.7.el8.s390x.rpm cri-o-1.20.5-6.rhaos4.7.gitec973a2.el8.s390x.rpm cri-o-debuginfo-1.20.5-6.rhaos4.7.gitec973a2.el8.s390x.rpm cri-o-debugsource-1.20.5-6.rhaos4.7.gitec973a2.el8.s390x.rpm x86_64: coreos-installer-0.8.0-4.rhaos4.7.el8.x86_64.rpm coreos-installer-bootinfra-debuginfo-0.8.0-4.rhaos4.7.el8.x86_64.rpm coreos-installer-debuginfo-0.8.0-4.rhaos4.7.el8.x86_64.rpm coreos-installer-debugsource-0.8.0-4.rhaos4.7.el8.x86_64.rpm cri-o-1.20.5-6.rhaos4.7.gitec973a2.el8.x86_64.rpm cri-o-debuginfo-1.20.5-6.rhaos4.7.gitec973a2.el8.x86_64.rpm cri-o-debugsource-1.20.5-6.rhaos4.7.gitec973a2.el8.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on howto verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2021-20319 https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYXkI4tzjgjWX9erEAQgnmg//Ra8+CHcceUK2+qI5zh3oBsfsJ7v0l+k2 WCmgzq4QEvzebYcEMCOWEUvcWs2aZ/evT015rF2wCSNgFZ4gq/9kR8tqIlZHGj7y pVy6OMo+k8WD5tLE5p50l1iSnbVgnk4+d/cwN4ht0a0DI65OoB6Lclx1KjEcKfYK K01qLVgo5ipm+TdeGgzE4AR7sEsYFZ/Yg60201KfBatglHnjjpO8QxmtPX0et1ZA Upf0U6wxqKxGD+9aubyJnENs7JOPROJ6ncAF5tCoWl7ZSOqXryynk/4w7tHkiWky NGOCkNZBTMZAOGTvOyfvCxZ2UK4qlbmP+wuBWArjl+i+KcVtE+yIWQU8lASTiVfg UMwTvDOETo7nuVXv8OAbIv/4Zq5B38mPxjCPUQfdCFvU3Kfe6y/tEQBPKkd74ck5 VntvtxQc5qBwbf+EIkxkXRjMvzGVxinIY440RmSGgOJzTvvOu+c6TbgwEI04jkx7 QcZO7hhC2Uxh+GHuuFX/8W9N9SjPEoLnSO7xxO5Mb7LPMirJTXwBCZ9e8R5cRg8C lj43mztvs7KX9Yp3uDHU3hhJaHF/+ls7PaHdi50K4XEpy5qmqhGl3cENL8c8uA5S Gpr7YabnfcyF2nAWD7RPKkhY+NXUtkaU0cQCR4Cmhxx8XXqIDzCJLCAMrwRuSgEp qBzSH/pdt6E=zldQ -----END PGP SIGNATURE----- -- RHSA-announce mailing list
Oct 27, 2021
Red Hat
89
security advisoryupdatecriticalFedora 33: 2021-449a2bdaf3 Critical: Rust-CoreOS Signature Issue
[New upstream release](https://github.com/coreos/coreos-installer/releases/tag/v0.10.1) fixing CVE-2021-20319.. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2021-449a2bdaf3 2021-10-20 19:26:10.134714 --------------------------------------------------------------------------------Name : rust-coreos-installer Product : Fedora 33 Version : 0.10.1 Release : 2.fc33 URL : Summary : Installer for Fedora CoreOS and RHEL CoreOS Description : coreos-installer installs Fedora CoreOS or RHEL CoreOS to bare-metal machines (or, occasionally, to virtual machines). --------------------------------------------------------------------------------Update Information: [New upstream release](https://github.com/coreos/coreos-installer/releases/tag/v0.10.1) fixing CVE-2021-20319. --------------------------------------------------------------------------------ChangeLog: * Tue Oct 12 2021 Benjamin Gilbert - 0.10.1-2 - Rebuild for F33 bump * Mon Oct 11 2021 Benjamin Gilbert - 0.10.1-1 - New release * Tue Sep 14 2021 Sahana Prasad - 0.10.0-3 - Rebuilt with OpenSSL 3.0.0 * Tue Aug 17 2021 Dusty Mabe - 0.10.0-2 - Add F36 signing key * Wed Aug 4 2021 Jonathan Lebon - 0.10.0-1 - New release * Fri Jul 23 2021 Fedora Release Engineering - 0.9.1-3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild * Tue Jul 13 2021 Jonathan Lebon - 0.9.1-2 - Backport "install: restrict access permissions on /boot/ignition{,/config.ign}" https://github.com/coreos/coreos-installer/pull/571 * Mon May 17 2021 Sohan Kunkerkar - 0.9.1-1 - New release --------------------------------------------------------------------------------References: [ 1 ] Bug #2011862 - CVE-2021-20319 coreos-installer: incorrect signature verification on gzip-compressed install images https://bugzilla.redhat.com/show_bug.cgi?id=2011862 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2021-449a2bdaf3' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/security/ --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list --
Oct 20, 2021
•Critical
Fedora
89
security advisoryupdatecriticalFedora: 2021-3d52eb54ca Critical: Rust-CoreOS-Installer Signature Issue
[New upstream release](https://github.com/coreos/coreos-installer/releases/tag/v0.10.1) fixing CVE-2021-20319.. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2021-3d52eb54ca 2021-10-20 19:22:32.242141 --------------------------------------------------------------------------------Name : rust-coreos-installer Product : Fedora 34 Version : 0.10.1 Release : 1.fc34 URL : Summary : Installer for Fedora CoreOS and RHEL CoreOS Description : coreos-installer installs Fedora CoreOS or RHEL CoreOS to bare-metal machines (or, occasionally, to virtual machines). --------------------------------------------------------------------------------Update Information: [New upstream release](https://github.com/coreos/coreos-installer/releases/tag/v0.10.1) fixing CVE-2021-20319. --------------------------------------------------------------------------------ChangeLog: * Mon Oct 11 2021 Benjamin Gilbert - 0.10.1-1 - New release * Tue Sep 14 2021 Sahana Prasad - 0.10.0-3 - Rebuilt with OpenSSL 3.0.0 --------------------------------------------------------------------------------References: [ 1 ] Bug #2011862 - CVE-2021-20319 coreos-installer: incorrect signature verification on gzip-compressed install images https://bugzilla.redhat.com/show_bug.cgi?id=2011862 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2021-3d52eb54ca' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list
Oct 20, 2021
•Critical
Fedora
89
security advisorymoderateFedoraFedora 34 2021-bb3ea1e191 Moderate: Lasso XML Signature Issue
CVE-2021-28091 lasso: XML signature wrapping vulnerability when parsing SAML responses. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2021-bb3ea1e191 2021-06-11 01:12:06.314121 --------------------------------------------------------------------------------Name : lasso Product : Fedora 34 Version : 2.7.0 Release : 1.fc34 URL : https://lasso.entrouvert.org/ Summary : Liberty Alliance Single Sign On Description : Lasso is a library that implements the Liberty Alliance Single Sign On standards, including the SAML and SAML2 specifications. It allows to handle the whole life-cycle of SAML based Federations, and provides bindings for multiple languages. --------------------------------------------------------------------------------Update Information: CVE-2021-28091 lasso: XML signature wrapping vulnerability when parsing SAML responses --------------------------------------------------------------------------------ChangeLog: * Wed Jun 2 2021 Jakub Hrozek - 2.7.0 - Lasso 2.7.0 - https://listes.entrouvert.com/arc/lasso/2021-06/msg00000.html - don't package java bindings as they are not maintained upstream anymore and there seem to be no users - Resolves: rhbz#1966607 - CVE-2021-28091 lasso: XML signature wrapping vulnerability when parsing SAML responses * Sun May 23 2021 Jitka Plesnikova - 2.6.1-9 - Perl 5.34 rebuild --------------------------------------------------------------------------------References: [ 1 ] Bug #1940089 - CVE-2021-28091 lasso: XML signature wrapping vulnerability when parsing SAML responses https://bugzilla.redhat.com/show_bug.cgi?id=1940089 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2021-bb3ea1e191' at the command line. For more information, refer to the dnf documentationavailable at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list --
Jun 10, 2021
•Important
Fedora
197
security advisorycriticaldebianDebian Stretch DLA-2684-1 Critical: Lasso Signature Verification Issue
A vulnerability was discovered in lasso, a library for Liberty Alliance and SAML protocols, which results to a improper verification of a cryptographic signature. . - ------------------------------------------------------------------------- Debian LTS Advisory DLA-2684-1
Jun 10, 2021
•Critical
Debian LTS
172
security advisorymoderatedenial of serviceUbuntu 20.10: 4906-1 Moderate: Nettle Denial of Service Issue
Nettle could be made to crash or bypass signature verification if it opened a specially crafted certificate.. =========================================================================Ubuntu Security Notice USN-4906-1 April 13, 2021 nettle vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Nettle could be made to crash or bypass signature verification if it opened a specially crafted certificate. Software Description: - nettle: low level cryptographic library Details: It was discovered that Nettle incorrectly handled signature verification. A remote attacker could use this issue to cause Nettle to crash, resulting in a denial of service, or possibly force invalid signatures. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: libnettle8 3.6-2ubuntu0.1 Ubuntu 20.04 LTS: libnettle7 3.5.1+really3.5.1-2ubuntu0.1 Ubuntu 18.04 LTS: libnettle6 3.4-1ubuntu0.1 Ubuntu 16.04 LTS: libnettle6 3.2-1ubuntu0.16.04.2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4906-1 CVE-2021-20305 Package Information: https://launchpad.net/ubuntu/+source/nettle/3.6-2ubuntu0.1 https://launchpad.net/ubuntu/+source/nettle/3.5.1+really3.5.1-2ubuntu0.1 https://launchpad.net/ubuntu/+source/nettle/3.4-1ubuntu0.1 https://launchpad.net/ubuntu/+source/nettle/3.2-1ubuntu0.16.04.2 . Varied editions of Ubuntu may face potential signature verification failures or crashes due to Nettle; patches are out.. Nettle Vulnerability, Denial of Service, Signature Issue. . Severity: Important. LinuxSecurity.com Team
Apr 13, 2021
•Important
Ubuntu
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