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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 to < d493cf57f4c4dae5396cd6ad41e5c209d0615a81affectedef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 to < c1ae0f973bcba5730871e35976a0ab6878fdac34affectedef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 to < 11db8df188b34bdb8c6a3a0bf438e5fc8cd75acaaffectedef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 to < 6247023fbbec1325029f2d5f2a7cdc0f9f9ea15aaffected
Linux Linux
Default version status: affected
6.12affected0 to < 6.12unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected