UBUNTU-CVE-2026-58221

Samba AD authenticated LDAP access domain takeover. Samba AD low-privilege authenticated LDAP access allows modifications to internal LDB special DNs, which permits a domain takeover...

PT-2026-65627

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 th...

PT-2026-65632

It was discovered that Samba's pam winbind incorrectly handled home directory ownership when mkhomedir was enabled. A local attacker could possibly use this issue to cause a denial of service by triggering a change in ownership of the root directory. CVE-2026-15779 Arjun Basnet, Douglas Bagnall,...

PT-2026-65629

It was discovered that Samba's pam winbind incorrectly handled home directory ownership when mkhomedir was enabled. A local attacker could possibly use this issue to cause a denial of service by triggering a change in ownership of the root directory. CVE-2026-15779 Arjun Basnet, Douglas Bagnall,...

DNS signing DoS via TKEY name cache exhaustion

== Summary: An unauthenticated user can repeatedly register names TKEY names, which floods a cache causing legitimate TKEYs to be expunged. This can practically block the use DNS TSIG signing. Description Only authenticated users are supposed to be able to use TKEY DNS records to register shared...

Samba AD LDAP Compare filter injection and trusted-request

Description Samba's LDAP CompareRequest path contains two independent security flaws that can be combined by an authenticated attacker to construct a reliable oracle for protected confidential Active Directory attributes. 1. Filter Injection Flaw When processing an LDAP Compare request, Samba...

Samba AD authenticated LDAP access domain takeover

Description Samba AD stores internal database configuration in LDB special records such as @MODULES and @PARTITION. These records are not directory objects and should never be writable by a normal LDAP client. An authenticated low-privilege domain user can nevertheless modify them through LDAP. T...

Debian dsa-6401 : ctdb - security update

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6401 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6401-1 [email protected] https://www.debian.org/securit...

An authenticated user could possibly crash a KDC process

== Summary: A kpasswd packet that contains malformed ASN.1 might cause the server to access 6 bytes of unallocated memory. This memory is not exposed to the user, but in some circumstances the server could crash. Description A miscalculation means an ASN.1 structure used in a Kerberos password...

PT-2026-65628

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...

TSIG packet with name compression can crash DNS

== Summary: Incorrect size calculations when a TSIG record contains compressed names can lead to a large out-of-bounds write causing the server to crash. Description To calculate the size of a DNS packet region signed by a TSIG record, Samba's internal DNS server subtracted the presumed size of t...

PT-2026-65630

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 ...

SUSE CVE-2026-64389

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate NTLMv2 response before updating session key ksmbdauthntlmv2 derives the NTLMv2 session key into sess-sesskey before it verifies the NTLMv2 response. ksmbddecodentlmsspauthblob then continues into KEYXCH even when...

SUSE CVE-2026-64396

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct filelock in SMB2LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILELOCKDEFERRED path, ksmbd registers the asynchronous work into the connection's asyncrequests...

UBUNTU-CVE-2026-64396

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct filelock in SMB2LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILELOCKDEFERRED path, ksmbd registers the asynchronous work into the connection's asyncrequests...

UBUNTU-CVE-2026-64398

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a permission check for FSCTLSETZERODATA FSCTLSETZERODATA in smb2ioctl destroys file data via ksmbdvfszerodata - vfsfallocatePUNCHHOLE/ZERORANGE after checking only the share-level KSMBDTREECONNFLAGWRITABLE, with no...

UBUNTU-CVE-2026-64397

In the Linux kernel, the following vulnerability has been resolved: ksmbd: serialize QUERYDIRECTORY requests per file smb2querydir stores a pointer to its stack-allocated private data in the ksmbdfile readdirdata. Concurrent QUERYDIRECTORY requests using the same file handle can overwrite this...

CVE-2026-64395 ksmbd: require source read access for duplicate extents

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require source read access for duplicate extents FSCTLDUPLICATEEXTENTSTOFILE passes the source file directly to vfsclonefilerange or vfscopyfilerange without checking the SMB access mask granted to the source handle. A...

CVE-2026-64387

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2querydirectoryinit fails before the next send, cleanup retains the previous buffer...

CVE-2026-64381

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix next buffer leak in receiveencryptedstandard receiveencryptedstandard allocates nextbuffer before checking whether the number of compound PDUs already reached MAXCOMPOUND. If the limit check fails, the function...