CVE-2026-89683
- Source
- https://cve.org/CVERecord?id=CVE-2026-89683
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89683.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89683
- Downstream
- Published
- 2026-09-11T19:46:05Z
- Modified
- 2026-09-13T03:47:20Z
- Summary
- nfsd: fix dentry ref leak on V4ROOT export filehandle lookup
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89683.json" }- References
-
- https://git.kernel.org/stable/c/11db8df188b34bdb8c6a3a0bf438e5fc8cd75aca
- https://git.kernel.org/stable/c/6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a
- https://git.kernel.org/stable/c/c1ae0f973bcba5730871e35976a0ab6878fdac34
- https://git.kernel.org/stable/c/d493cf57f4c4dae5396cd6ad41e5c209d0615a81
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89683.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89683
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedef7f6c4904d03ccd7478e1ac20ed75f79c4ac444Fixedd493cf57f4c4dae5396cd6ad41e5c209d0615a81Fixedc1ae0f973bcba5730871e35976a0ab6878fdac34Fixed11db8df188b34bdb8c6a3a0bf438e5fc8cd75acaFixed6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a