CVE-2026-89699

CVE CVE-2026-89699EUVD EUVD-2026-76611Published 2026-09-11T19:46:17.000ZLast changed 2026-09-14T12:02:05.000ZCVSS 7.5

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: nfsd: validate symlink target length in NFSv4 CREATE nfsd4_decode_create() accepts an unbounded cr_datalen from the wire for NF4LNK symlink targets, allowing a client to force a kmalloc of up to the maximum RPC payload size (several MiB) per COMPOUND op that persists until compound teardown. The VFS rejects oversized targets with ENAMETOOLONG, but the allocation has already occurred. Reject cr_datalen == 0 early with nfserr_inval and cr_datalen greater than NFS4_MAXPATHLEN (PATH_MAX) with nfserr_nametoolong to bound the allocation.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <041f57056e5fb9c80adc088269322d2c61074406; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b24843ea3de1676b29902457b38507c95a80649b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <45ec115cbfecb4b3cfab7fca6f73d1b60696a25a; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <895a485cd3758031ef9993c0d53cf19ce8fb4ccc; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <888dad4b557352cf85be31613407b5ba51ad07d1; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <36011308b3f01ce7dc9954f3cefcbb5291af9f95; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8661d3cb38fd148947e57dbc0871fd4d3fa33bbf; patch: 7.2.4; patch: 0; patch: 5.15.221; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3ef5e7a01a4d74995a65496bc9166d1e980a4355; patch: 6.6.157; patch: 7.3-rc1; patch: 6.1.188; patch: 6.18.50; patch: 5.10.270; 2.6.12; patch: 6.12.109

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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