Описание
Security update for samba
This update for samba fixes the following issues:
- CVE-2026-6949: TSIG packet with crafted name compression can crash internal DNS server (bsc#1271672).
- CVE-2026-15779:
pam_winbindmodule withmkhomedirset allowschownof critical system paths without validation (bsc#1271469). - CVE-2026-58216: 6-byte heap OOB read in packet parser of the
kpasswdservice (bsc#1271674). - CVE-2026-58218: DNS TKEY negotiation stores unauthenticated GSS contexts in a fixed FIFO before authentication completes (bsc#1271675).
- CVE-2026-58221: authenticated LDAP access to internal LDB special DNs permits domain takeover (bsc#1271676).
- CVE-2026-58222: LDAP Compare filter injection and trusted-request confusion disclose protected attributes (bsc#1271677).
- CVE-2026-58224: heap OOB read due to unchecked packet length fields in CTDB (bsc#1271673).
Список пакетов
openSUSE Leap 16.0
Ссылки
- SUSE Security Ratings
- SUSE Bug 1271469
- SUSE Bug 1271672
- SUSE Bug 1271673
- SUSE Bug 1271674
- SUSE Bug 1271675
- SUSE Bug 1271676
- SUSE Bug 1271677
- SUSE CVE CVE-2026-15779 page
- SUSE CVE CVE-2026-58216 page
- SUSE CVE CVE-2026-58218 page
- SUSE CVE CVE-2026-58221 page
- SUSE CVE CVE-2026-58222 page
- SUSE CVE CVE-2026-58224 page
- SUSE CVE CVE-2026-6949 page
Описание
A flaw was found in samba's pam_winbind. When mkhomedir is enabled, pam_winbind chowns the target account's home directory without validating the path is not a critical system directory such as /. On affected systems, accounts with / as their home directory (a common default for system accounts) can have this triggered not only by root, but by a non-root user holding a narrow sudo delegation to run commands as that account, causing ownership of / to change and resulting in severe denial of service (SSH, sudo, and package-manager failures). The change does not grant write access to / (which ships with restrictive 0555 permissions on RHEL), so the impact is availability loss rather than further privilege escalation.
Затронутые продукты
Ссылки
- CVE-2026-15779
- SUSE Bug 1271469
Описание
An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of the allocated buffer. While this out-of-bounds read typically results in a harmless decryption failure, if the read hits unmapped memory, it causes the KDC process to crash. An authenticated attacker can send a specially crafted kpasswd request containing malformed ASN.1 data to trigger the out-of-bounds read, which may cause the KDC process to terminate, resulting in a denial of service.
Затронутые продукты
Ссылки
- CVE-2026-58216
- SUSE Bug 1271674
Описание
A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration requests were added to the TKEY name cache before being rejected. A remote, unauthenticated attacker can exploit this behavior by sending a large number of TKEY requests with arbitrary names, exhausting the cache and evicting legitimate TKEY entries. This can prevent legitimate TSIG authentication for signed DNS queries, resulting in a denial of service.
Затронутые продукты
Ссылки
- CVE-2026-58218
- SUSE Bug 1271675
Описание
unknown
Затронутые продукты
Ссылки
- CVE-2026-58221
- SUSE Bug 1271676
Описание
A security flaw combining LDAP filter injection and improper authorization checks was found in Samba Active Directory Domain Controller (AD DC). When processing LDAP Compare requests, Samba fails to properly validate user-supplied attribute names and executes the resulting internal database search in a trusted context, bypassing normal Access Control List (ACL) enforcement. An authenticated low-privilege domain user can exploit these flaws to disclose confidential Active Directory attributes that would normally be inaccessible. The disclosed information may be leveraged to derive sensitive authentication material, potentially leading to privilege escalation and complete domain compromise. For example: In deployments configured with Group Managed Service Accounts (gMSAs), an attacker can extract the "msKds-RootKeyData" attribute and derive gMSA passwords offline, potentially leading to complete domain compromise if privileged gMSAs are present.
Затронутые продукты
Ссылки
- CVE-2026-58222
- SUSE Bug 1271677
Описание
unknown
Затронутые продукты
Ссылки
- CVE-2026-58224
- SUSE Bug 1271673
Описание
unknown
Затронутые продукты
Ссылки
- CVE-2026-6949
- SUSE Bug 1271672
- SUSE Bug 1271675