CVE-2026-89683: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 преди d493cf57f4c4dae5396cd6ad41e5c209d0615a81; ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 преди c1ae0f973bcba5730871e35976a0ab6878fdac34; ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 преди 11db8df188b34bdb8c6a3a0bf438e5fc8cd75aca; ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444 преди 6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a
• Linux Linux: 6.12; преди 6.12; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89683
• https://nvd.nist.gov/vuln/detail/CVE-2026-89683
• https://git.kernel.org/stable/c/d493cf57f4c4dae5396cd6ad41e5c209d0615a81
• https://git.kernel.org/stable/c/c1ae0f973bcba5730871e35976a0ab6878fdac34
• https://git.kernel.org/stable/c/11db8df188b34bdb8c6a3a0bf438e5fc8cd75aca
• https://git.kernel.org/stable/c/6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a