{"id":21621,"date":"2026-09-12T04:31:25","date_gmt":"2026-09-11T20:31:25","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89699"},"modified":"2026-09-12T04:31:25","modified_gmt":"2026-09-11T20:31:25","slug":"cve-2026-89699","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89699","title":{"rendered":"CVE-2026-89699 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: validate symlin"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>nfsd: validate symlink target length in NFSv4 CREATE<\/p>\n<p>nfsd4_decode_create() accepts an unbounded cr_datalen from the wire for<br \/>\nNF4LNK symlink targets, allowing a client to force a kmalloc of up to<br \/>\nthe maximum RPC payload size (several MiB) per COMPOUND op that persists<br \/>\nuntil compound teardown.  The VFS rejects oversized targets with<br \/>\nENAMETOOLONG, but the allocation has already occurred.<\/p>\n<p>Reject cr_datalen == 0 early with nfserr_inval and cr_datalen greater<br \/>\nthan NFS4_MAXPATHLEN (PATH_MAX) with nfserr_nametoolong to bound the<br \/>\nallocation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>nfsd: validate symlink target length in NFSv4 CREATE<\/p>\n<p>nfsd4_decode_create() accepts an unbounded cr_datalen from the wire for<br \/>\nNF4LN<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21621","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21621"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}