CVE-2026-89687

CVE CVE-2026-89687EUVD EUVD-2026-76599Published 2026-09-11T19:46:08.000ZLast changed 2026-09-13T06:33:11.000ZCVSS 7.5

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: nfsd: ensure nfsd_file_do_acquire() does not use a non-opened file ->atomic_open is permitted to return success without actually opening the file. It indicates this by calling finish_no_open(). This means dentry_create() can return a file which hasn't been opened. This is extremely unlikely as ->atomic_open handlers typically use finish_no_open() only for already existing files, and dentry_create() isn't called in that case, and the parent being locked should prevent races. However out of an abundance of caution it seems wise to teach nfsd to only use the file returned by dentry_create() if FMODE_OPENED is set, indicating that it has in fact been opened.

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: 7.3-rc1; 64a989dbd144e0622371396461b11335459692d2 <5859cc01fee06a2cd7458905a9593082fbab06e1; 7.0; patch: 0; 64a989dbd144e0622371396461b11335459692d2 <a95a1cffacd0203100297001719160160f443dd6; patch: 7.2.4

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

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.