A flaw was found in Samba’s WINS server component when running as an Active Directory Domain Controller. The WINS protocol handlers for certain request types did not properly validate incoming packets, allowing an unauthenticated remote attacker to trigger a NULL pointer dereference and crash the WINS service using specially crafted UDP packets.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade samba | Jun 9, 2026 | Jun 8, 2026 |
| Amazon Linux Ami 2 | — | Upgrade samba-commonUpgrade samba-debuginfoUpgrade samba-krb5-printingUpgrade samba-testUpgrade samba-pidlUpgrade samba-client-libsUpgrade samba-pythonUpgrade ctdbUpgrade libwbclientUpgrade samba-dcUpgrade samba-develUpgrade samba-python-testUpgrade samba-vfs-glusterfsUpgrade ctdb-testsUpgrade samba-winbind-clientsUpgrade samba-libsUpgrade samba-clientUpgrade samba-winbind-krb5-locatorUpgrade samba-common-toolsUpgrade samba-winbind-modulesUpgrade libsmbclientUpgrade libsmbclient-develUpgrade samba-winbindUpgrade samba-test-libsUpgrade samba-dc-libsUpgrade libwbclient-develUpgrade sambaUpgrade samba-common-libs | Jul 8, 2026 | Jul 8, 2026 |
| Amazon_linux_2023 | — | Upgrade samba-test-libsUpgrade libwbclient-debuginfoUpgrade samba-ldb-ldap-modulesUpgrade samba-testUpgrade samba-dcerpc-debuginfoUpgrade samba-common-tools-debuginfoUpgrade libnetapiUpgrade samba-winbind-clients-debuginfoUpgrade samba-test-libs-debuginfoUpgrade samba-vfs-iouringUpgrade python3-samba-dcUpgrade samba-toolsUpgrade libwbclientUpgrade samba-pidlUpgrade samba-commonUpgrade samba-dc-libs-debuginfoUpgrade python3-samba-develUpgrade samba-krb5-printing-debuginfoUpgrade samba-client-libsUpgrade samba-krb5-printingUpgrade samba-test-debuginfoUpgrade samba-ldb-ldap-modules-debuginfoUpgrade samba-common-libs-debuginfoUpgrade samba-debugsourceUpgrade samba-debuginfoUpgrade python3-samba-dc-debuginfoUpgrade samba-winbind-krb5-locator-debuginfoUpgrade samba-libsUpgrade libnetapi-debuginfoUpgrade python3-sambaUpgrade samba-client-libs-debuginfoUpgrade samba-libs-debuginfoUpgrade samba-dcerpcUpgrade libsmbclient-develUpgrade samba-clientUpgrade samba-common-toolsUpgrade libwbclient-develUpgrade libnetapi-develUpgrade samba-winbind-modulesUpgrade samba-dc-libsUpgrade samba-usersharesUpgrade samba-winbind-clientsUpgrade samba-develUpgrade samba-common-libsUpgrade python3-samba-debuginfoUpgrade samba-vfs-iouring-debuginfoUpgrade libsmbclient-debuginfoUpgrade samba-winbind-krb5-locatorUpgrade sambaUpgrade samba-winbind-modules-debuginfoUpgrade python3-samba-testUpgrade samba-winbind-debuginfoUpgrade libsmbclientUpgrade samba-winbindUpgrade samba-client-debuginfo | Jun 23, 2026 | Jun 8, 2026 |
| Debian | — | Upgrade samba | May 27, 2026 | May 27, 2026 |
| Suse | — | Upgrade samba-dcerpcUpgrade samba-libs-python3Upgrade samba-python3Upgrade samba-docUpgrade ctdb-pcp-pmdaUpgrade samba-ldb-ldapUpgrade samba-client-libsUpgrade samba-libs-32bitUpgrade samba-winbind-libsUpgrade samba-libs-python3-32bitUpgrade libldb2Upgrade samba-gpupdateUpgrade samba-cephUpgrade samba-client-langUpgrade samba-winbind-libs-32bitUpgrade libldb2-32bitUpgrade samba-ad-dc-libs-32bitUpgrade sambaUpgrade samba-ad-dc-libsUpgrade libldb-develUpgrade samba-ad-dcUpgrade samba-winbindUpgrade samba-winbind-libs-langUpgrade libsamba-policy0-python3Upgrade ctdbUpgrade samba-toolUpgrade samba-devel-32bitUpgrade samba-client-32bitUpgrade samba-dsdb-modulesUpgrade libsamba-policy-python3-develUpgrade samba-client-libs-32bitUpgrade samba-clientUpgrade ldb-toolsUpgrade samba-develUpgrade libsamba-policy-develUpgrade samba-testUpgrade libsamba-policy0-python3-32bitUpgrade python3-ldbUpgrade samba-libs | May 27, 2026 | May 27, 2026 |
| Ubuntu | — | Upgrade sambaUpgrade registry-tools (Ubuntu Pro)Upgrade winbind (Ubuntu Pro)Upgrade samba-dsdb-modules (Ubuntu Pro)Upgrade ctdb (Ubuntu Pro)Upgrade libsmbclient-dev (Ubuntu Pro)Upgrade libnss-winbind (Ubuntu Pro)Upgrade smbclient (Ubuntu Pro)Upgrade libwbclient-dev (Ubuntu Pro)Upgrade samba-common-bin (Ubuntu Pro)Upgrade samba-libs (Ubuntu Pro)Upgrade samba-vfs-modules (Ubuntu Pro)Upgrade libsmbclient (Ubuntu Pro)Upgrade python3-samba (Ubuntu Pro)Upgrade samba-common (Ubuntu Pro)Upgrade samba-dev (Ubuntu Pro)Upgrade libpam-winbind (Ubuntu Pro)Upgrade libwbclient0 (Ubuntu Pro)Upgrade samba (Ubuntu Pro) | May 27, 2026 | May 26, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 13, 2026 | Jun 8, 2026 |
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