{"id":"CVE-2026-89710","summary":"NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path\n\nWhen the server returns a new layout stateid while a valid one is still\nheld, pnfs_layout_process() calls pnfs_mark_matching_lsegs_return() on\nthe on-stack free_me list and jumps to out_forget. Segments whose\nreference count drops to zero are unlinked from lo-\u003eplh_segs and moved\nto free_me by mark_lseg_invalid(); for an idle cached segment the layout\nheader holds the only reference, so this happens on the first decrement.\n\nout_forget never drains free_me -- only the success path calls\npnfs_free_lseg_list().\n\nCommit 814b84971388 (\"pNFS/NFSv4: Fix a layout segment leak in\npnfs_layout_process()\") added the drain; commit 08bd8dbe8882\n(\"pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()\")\nremoved it while switching the destination to lo-\u003eplh_return_segs, which\nis drained elsewhere. Commit fb700ef02676 (\"NFSv4.1: Simplify layout\nreturn in pnfs_layout_process()\") switched the destination back to\nfree_me without restoring the drain.\n\nRestore the pnfs_free_lseg_list() call.","modified":"2026-09-13T03:46:33.718939352Z","published":"2026-09-11T19:46:25.534Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89710.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070"},{"type":"WEB","url":"https://git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89710.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89710"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fb700ef026766c95578aafc0db1b208946e7ad4f"},{"fixed":"7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2"},{"fixed":"36e3f13bf0728f4ce11ee8904cec82a783222f62"},{"fixed":"32ac1b0b7f1cfa0d1a1faf9c72f4154046101070"},{"fixed":"ee5a386cfe60f3f8286de16a9db8e1a08f0bc124"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89710.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89710.json"}}],"schema_version":"1.9.0"}