CVE-2026-68083

CVE CVE-2026-68083EUVD EUVD-2026-55264Published 2026-08-10T11:41:47.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix path resolution in ksmbd_vfs_kern_path_create The SMB2 open lookup is rooted at the share with LOOKUP_BENEATH, but the create/mkdir/hardlink sink is not: ksmbd_vfs_kern_path_create() builds an absolute path with convert_to_unix_name() and resolves it from AT_FDCWD via start_creating_path(), so a ".." component is walked from the real filesystem root and escapes the export. An authenticated client races a missing path component so the rooted open lookup returns -ENOENT (taking the create branch) while the same component is present (a directory) when the create walk runs; the create then resolves ".." out of the share. Root the create walk at the share like the lookup and rename paths already are: resolve the parent with vfs_path_parent_lookup(..., LOOKUP_BENEATH, &share_conf->vfs_path) and create the final component with start_creating_noperm(). convert_to_unix_name() then has no callers and is removed.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 0; 265fd1991c1db85fbabaad4946ca0e63e2ae688d <489d1ded01425c0fb33418172c0e4e588467526b; patch: 7.2-rc1; patch: 6.18.40; patch: 7.1.5; 265fd1991c1db85fbabaad4946ca0e63e2ae688d <1c8951963d8ed357f70f59e0ad4ddce2199d2016; 265fd1991c1db85fbabaad4946ca0e63e2ae688d <c7c884a1305aa4540eb7942a50bd356b34120e1f; 265fd1991c1db85fbabaad4946ca0e63e2ae688d <98185b3025beeae92d1fe700d5db26b9ac4bf025; 5.15; patch: 6.12.97

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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