CVE-2026-89683
CVE CVE-2026-89683EUVD EUVD-2026-76595Published 2026-09-11T19:46:05.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix dentry ref leak on V4ROOT export filehandle lookup nfsd_set_fh_dentry() leaks the dentry reference from exportfs_decode_fh_raw() when the NFS3_FHSIZE or NFS_FHSIZE switch cases detect NFSEXP_V4ROOT and goto out. The out: label calls exp_put() but never dput(dentry), and fhp->fh_dentry was never assigned so fh_put() cannot compensate. A crafted NFSv3 filehandle targeting a V4ROOT export's fsid triggers the leak on every request.
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 ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 <d493cf57f4c4dae5396cd6ad41e5c209d0615a81; ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 <6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a; patch: 7.3-rc1; ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 <11db8df188b34bdb8c6a3a0bf438e5fc8cd75aca; ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 <c1ae0f973bcba5730871e35976a0ab6878fdac34; patch: 7.2.4; 6.12; patch: 0; patch: 6.12.109; patch: 6.18.50
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
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