Astra Linux – Vulnerability in Samba

A Type Confusion vulnerability was discovered in Samba’s mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary, where the keys are character strings, and the values can be any of the supported types in the mdssvc...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb/server: A possible reference count leak in smb2sesssetup has been fixed. The reference count of ksmbdsession will leak when a session needs to be reconnected. This issue has been fixed by adding the missing ksmbdusersessionpu...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Validating the payload size in the IPC response When installing malicious ksmbd-tools, ksmbd.mountd may return an invalid IPC response to the ksmbd kernel server. ksmbd should validate the payload size of the IPC response...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

A use-after-free flaw was discovered in the setupasyncwork function in the KSMBD implementation of the in-kernel Samba server and CIFS services in the Linux kernel. This issue could allow an attacker to crash the system by accessing freed resources...

CVE-2026-58216

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...

EUVD-2026-51128

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...

CVE-2026-58218 Samba: dns signing dos via tkey name cache exhaustion

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...

CVE-2026-64400

A flaw was found in the Linux kernel's ksmbd component. A vulnerability in the ksmbd component allows a remote authenticated attacker to bypass path restrictions. Specifically, a bug in the caseless retry logic during path resolution fails to properly handle directory traversal attempts. This...

SUSE SLES12: ctdb / libsamba-policy-devel / libsamba-policy-python3-devel / etc (SUSE-SU-2026:3367-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3367-1 advisory. This update for samba fixes the following issues - CVE-2026-6949: TSIG packet with crafted name compression can crash internal DNS server...

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...

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...

Linux Distros Unpatched Vulnerability : CVE-2026-64391

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: use opener credentials for ADS I/O Alternate data streams are stored as xattrs. Unlike regular file I/O, their read and write paths therefore call VFS...

CVE-2026-64142

In the Linux kernel, the following vulnerability has been resolved: ksmbd: close durable scavenger races against mfplist lookups ksmbddurablescavenger has two related races against any walker that iterates fci-mfplist, including ksmbdlookupfdinode used by ksmbdvfsrename and the share-mode checks ...

EUVD-2026-44662

A flaw was found in samba's pamwinbind. When mkhomedir is enabled, pamwinbind 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...

CVE-2026-53271

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix NULL-deref of opinfo-conn in oplock/lease break notifiers smb2oplockbreaknoti and smb2leasebreaknoti read opinfo-conn into a local with neither READONCE nor a NULL check. Both run from oplockbreak after opinfogetlist h...

EUVD-2026-39289

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: In the vfs module, a race condition occurred regarding the mFlags field. ksmbd maintains states such as “delete-on-close” and “pending-delete” in the mFlags field of the ksmbdinode structure. In the vfscache.c code, thi...

samba: group policy certificate enrollment uses http:// without validation

A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability t...