CVE-2021-47316

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix NULL dereference in nfs3svc_encode_getaclres In error cases the dentry may be NULL. Before 20798dfe249a, the encoder also checked dentry and d_really_is_positive(dentry), but that looks like overkill to me--zero status should be enough to guarantee a positive dentry. This isn't the first time we've seen an error-case NULL dereference hidden in the initialization of a local variable in an xdr encoder. But I went back through the other recent rewrites and didn't spot any similar bugs.

The following products are affected by CVE-2021-47316 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2021-47316.

URL	Resource
https://git.kernel.org/stable/c/650e6f383a6eb40f7c0a010982a74ab4b6893870
https://git.kernel.org/stable/c/ab1016d39cc052064e32f25ad18ef8767a0ee3b8
https://git.kernel.org/stable/c/e79057d15d96ef19de4de6d7e479bae3d58a2a8d
https://lore.kernel.org/linux-cve-announce/2024052130-CVE-2021-47316-e2c2@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47316
https://www.cve.org/CVERecord?id=CVE-2021-47316