CVE-2026-89683
Last modified
CVE-2026-89683 is a vulnerability of currently unknown severity. 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..
Description
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.
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444, < d493cf57f4c4dae5396cd6ad41e5c209d0615a81; >= ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444, < c1ae0f973bcba5730871e35976a0ab6878fdac34; >= ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444, < 11db8df188b34bdb8c6a3a0bf438e5fc8cd75aca; >= ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444, < 6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a |
| Linux | Linux | 6.12 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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