CVE-2026-89710
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path When the server returns a new layout stateid while a valid one is still held, pnfs_layout_process() calls pnfs_mark_matching_lsegs_return() on the on-stack free_me list and jumps to out_forget. Segments whose reference count drops to zero are unlinked from lo->plh_segs and moved to free_me by mark_lseg_invalid(); for an idle cached segment the layout header holds the only reference, so this happens on the first decrement. out_forget never drains free_me -- only the success path calls pnfs_free_lseg_list(). Commit 814b84971388 ("pNFS/NFSv4: Fix a layout segment leak in pnfs_layout_process()") added the drain; commit 08bd8dbe8882 ("pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()") removed it while switching the destination to lo->plh_return_segs, which is drained elsewhere. Commit fb700ef02676 ("NFSv4.1: Simplify layout return in pnfs_layout_process()") switched the destination back to free_me without restoring the drain. Restore the pnfs_free_lseg_list() call.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-11 20:19:58.380000
Last modified
2026-10-19 09:18:09.850000
View original CVE JSON
{
"id": "CVE-2026-89710",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-11T20:19:58.380",
"lastModified": "2026-10-19T09:18:09.850",
"vulnStatus": "Received",
"cveTags": [],
"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": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"fs/nfs/pnfs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
"lessThan": "f52188118d319b47d49ee91a897f6afda4879c59",
"versionType": "git",
"status": "affected"
},
{
"version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
"lessThan": "ad3e41855325e55623276660ef20fbc3b8ba087f",
"versionType": "git",
"status": "affected"
},
{
"version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
"lessThan": "a080bb69d30f11738d753a60d1eb733d627c2093",
"versionType": "git",
"status": "affected"
},
{
"version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
"lessThan": "7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2",
"versionType": "git",
"status": "affected"
},
{
"version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
"lessThan": "36e3f13bf0728f4ce11ee8904cec82a783222f62",
"versionType": "git",
"status": "affected"
},
{
"version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
"lessThan": "32ac1b0b7f1cfa0d1a1faf9c72f4154046101070",
"versionType": "git",
"status": "affected"
},
{
"version": "fb700ef026766c95578aafc0db1b208946e7ad4f",
"lessThan": "ee5a386cfe60f3f8286de16a9db8e1a08f0bc124",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"fs/nfs/pnfs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.13",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.13",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.109",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.50",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.4",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/32ac1b0b7f1cfa0d1a1faf9c72f4154046101070",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/36e3f13bf0728f4ce11ee8904cec82a783222f62",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7c5b0e813efd9124760d5fd1bfc6b229f03fb1a2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a080bb69d30f11738d753a60d1eb733d627c2093",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ad3e41855325e55623276660ef20fbc3b8ba087f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ee5a386cfe60f3f8286de16a9db8e1a08f0bc124",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f52188118d319b47d49ee91a897f6afda4879c59",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}