{"id":"CVE-2026-89710","state":"PUBLISHED","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.","publishedAt":"2026-09-11T19:46:25.534Z","updatedAt":"2026-10-19T08:51:23.214Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"f52188118d319b47d49ee91a897f6afda4879c59","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"ad3e41855325e55623276660ef20fbc3b8ba087f","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"a080bb69d30f11738d753a60d1eb733d627c2093","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"36e3f13bf0728f4ce11ee8904cec82a783222f62","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"32ac1b0b7f1cfa0d1a1faf9c72f4154046101070","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"ee5a386cfe60f3f8286de16a9db8e1a08f0bc124","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfs/pnfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfs/pnfs.c"]}],"references":["https://git.kernel.org/stable/c/f52188118d319b47d49ee91a897f6afda4879c59","https://git.kernel.org/stable/c/ad3e41855325e55623276660ef20fbc3b8ba087f","https://git.kernel.org/stable/c/a080bb69d30f11738d753a60d1eb733d627c2093","https://git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2","https://git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62","https://git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070","https://git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89710.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89710","state":"PUBLISHED","datePublished":"2026-09-11T19:46:25.534Z","dateUpdated":"2026-10-19T08:51:23.214Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.751Z"},"containers":{"cna":{"title":"NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"f52188118d319b47d49ee91a897f6afda4879c59","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"ad3e41855325e55623276660ef20fbc3b8ba087f","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"a080bb69d30f11738d753a60d1eb733d627c2093","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"36e3f13bf0728f4ce11ee8904cec82a783222f62","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"32ac1b0b7f1cfa0d1a1faf9c72f4154046101070","versionType":"git"},{"version":"fb700ef026766c95578aafc0db1b208946e7ad4f","status":"affected","lessThan":"ee5a386cfe60f3f8286de16a9db8e1a08f0bc124","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfs/pnfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfs/pnfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f52188118d319b47d49ee91a897f6afda4879c59"},{"url":"https://git.kernel.org/stable/c/ad3e41855325e55623276660ef20fbc3b8ba087f"},{"url":"https://git.kernel.org/stable/c/a080bb69d30f11738d753a60d1eb733d627c2093"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:51:23.214Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}