{"api_version":"1","generated_at":"2026-09-11T22:05:28+00:00","cve":"CVE-2026-89710","urls":{"html":"https://cve.report/CVE-2026-89710","api":"https://cve.report/api/cve/CVE-2026-89710.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89710","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89710"},"summary":{"title":"NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path","description":"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->plh_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->plh_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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:58","updated_at":"2026-09-11 20:19:58"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62","name":"https://git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070","name":"https://git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124","name":"https://git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2","name":"https://git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89710","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89710","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fb700ef026766c95578aafc0db1b208946e7ad4f 7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fb700ef026766c95578aafc0db1b208946e7ad4f 36e3f13bf0728f4ce11ee8904cec82a783222f62 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fb700ef026766c95578aafc0db1b208946e7ad4f 32ac1b0b7f1cfa0d1a1faf9c72f4154046101070 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fb700ef026766c95578aafc0db1b208946e7ad4f ee5a386cfe60f3f8286de16a9db8e1a08f0bc124 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/nfs/pnfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2","status":"affected","version":"fb700ef026766c95578aafc0db1b208946e7ad4f","versionType":"git"},{"lessThan":"36e3f13bf0728f4ce11ee8904cec82a783222f62","status":"affected","version":"fb700ef026766c95578aafc0db1b208946e7ad4f","versionType":"git"},{"lessThan":"32ac1b0b7f1cfa0d1a1faf9c72f4154046101070","status":"affected","version":"fb700ef026766c95578aafc0db1b208946e7ad4f","versionType":"git"},{"lessThan":"ee5a386cfe60f3f8286de16a9db8e1a08f0bc124","status":"affected","version":"fb700ef026766c95578aafc0db1b208946e7ad4f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/nfs/pnfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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->plh_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->plh_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."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:46:25.534Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2"},{"url":"https://git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62"},{"url":"https://git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070"},{"url":"https://git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124"}],"title":"NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89710","datePublished":"2026-09-11T19:46:25.534Z","dateReserved":"2026-09-11T19:38:34.751Z","dateUpdated":"2026-09-11T19:46:25.534Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:58","lastModifiedDate":"2026-09-11 20:19:58","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89710","Ordinal":"1","Title":"NFSv4.1: fix layout segment leak on the pnfs_layout_process() fo","CVE":"CVE-2026-89710","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89710","Ordinal":"1","NoteData":"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->plh_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->plh_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.","Type":"Description","Title":"NFSv4.1: fix layout segment leak on the pnfs_layout_process() fo"}]}}}