Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 before d493cf57f4c4dae5396cd6ad41e5c209d0615a81; affected ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 before c1ae0f973bcba5730871e35976a0ab6878fdac34; affected ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 before 11db8df188b34bdb8c6a3a0bf438e5fc8cd75aca; affected ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 before 6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.