Windows SMB Client Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate privileges locally...

CVE-2026-68388

A flaw was found in the Linux kernel's Server Message Block SMB client. The smb3simplefallocaterange function, which manages file allocation, can incorrectly process overlapping allocated ranges provided by a server. This can result in parts of a file not being properly zero-filled, leading to...

smb/client: handle overlapping allocated ranges in fallocate

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PT-2026-70534

Name of the Vulnerable Software and Affected Versions Windows SMB Client affected versions not specified Description An out-of-bounds read in the Windows SMB Client allows an unauthorized attacker to disclose sensitive information over a network, which can subsequently affect the system. An...

PT-2026-70549

Name of the Vulnerable Software and Affected Versions Windows SMB Server affected versions not specified Description A heap-based buffer overflow occurs in the Windows SMB Server, which allows an authorized attacker to execute arbitrary code over a network and affect the system. A heap-based buff...

PT-2026-70541

Name of the Vulnerable Software and Affected Versions Windows SMB Server affected versions not specified Description A heap-based buffer overflow occurs in the Windows SMB Server, which allows an authorized attacker to execute arbitrary code over a network and affect the system. A heap-based buff...

PT-2026-70687

Name of the Vulnerable Software and Affected Versions Windows SMB Client affected versions not specified Description A buffer over-read in the Windows SMB Client allows an unauthorized attacker to disclose sensitive information over a network, which can subsequently affect the system. A buffer...

PT-2026-70548

Name of the Vulnerable Software and Affected Versions Windows SMB Client affected versions not specified Description A heap-based buffer overflow occurs in the Windows SMB Client, which allows an authorized attacker to elevate privileges locally. A heap-based buffer overflow is a memory corruptio...

CVE-2026-68083

A flaw was found in ksmbd, a Linux kernel module that provides an in-kernel SMB server. An authenticated client could exploit a path resolution error, specifically in the ksmbdvfskernpathcreate function. This vulnerability allows a client to use ".." components in a path to escape the intended...

CVE-2026-68388

In the Linux kernel, the following vulnerability has been resolved: smb/client: handle overlapping allocated ranges in fallocate smb3simplefallocaterange can skip holes when an allocated range returned by the server starts before the current fallocate offset. The skipped hole is not zero-filled,...

CVE-2026-68343

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate DFS referral PathConsumed parsedfsreferrals validates that the response contains the fixed referral entry array and, on for-next, the per-referral string offsets. However, the response also contains a...

UBUNTU-CVE-2026-68343

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate DFS referral PathConsumed parsedfsreferrals validates that the response contains the fixed referral entry array and, on for-next, the per-referral string offsets. However, the response also contains a...

CVE-2026-68388 smb/client: handle overlapping allocated ranges in fallocate

In the Linux kernel, the following vulnerability has been resolved: smb/client: handle overlapping allocated ranges in fallocate smb3simplefallocaterange can skip holes when an allocated range returned by the server starts before the current fallocate offset. The skipped hole is not zero-filled,...

EUVD-2026-55574

In the Linux kernel, the following vulnerability has been resolved: smb/client: handle overlapping allocated ranges in fallocate smb3simplefallocaterange can skip holes when an allocated range returned by the server starts before the current fallocate offset. The skipped hole is not zero-filled,...

CVE-2026-68388 smb/client: handle overlapping allocated ranges in fallocate

In the Linux kernel, the following vulnerability has been resolved: smb/client: handle overlapping allocated ranges in fallocate smb3simplefallocaterange can skip holes when an allocated range returned by the server starts before the current fallocate offset. The skipped hole is not zero-filled,...

CVE-2026-68343 smb: client: validate DFS referral PathConsumed

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate DFS referral PathConsumed parsedfsreferrals validates that the response contains the fixed referral entry array and, on for-next, the per-referral string offsets. However, the response also contains a...

CVE-2026-68343 smb: client: validate DFS referral PathConsumed

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate DFS referral PathConsumed parsedfsreferrals validates that the response contains the fixed referral entry array and, on for-next, the per-referral string offsets. However, the response also contains a...

CVE-2026-68343

CVE-2026-68343 affects the Linux kernel SMB client. A malformed DFS referral can cause PathConsumed to exceed the search name, enabling out-of-bounds DFS path parsing. The root cause is in parse_dfs_referrals where PathConsumed is not validated against the search name length before storage. The f...

CVE-2026-68099 ksmbd: restore DACL size on check_add_overflow() to avoid malformed ACL

In the Linux kernel, the following vulnerability has been resolved: ksmbd: restore DACL size on checkaddoverflow to avoid malformed ACL checkaddoverflow unconditionally writes the truncated sum into d even on overflow, per its contract in include/linux/overflow.h. The four checkaddoverflow guards...

CVE-2026-68083 ksmbd: fix path resolution in ksmbd_vfs_kern_path_create

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix path resolution in ksmbdvfskernpathcreate The SMB2 open lookup is rooted at the share with LOOKUPBENEATH, but the create/mkdir/hardlink sink is not: ksmbdvfskernpathcreate builds an absolute path with converttounixname...