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CVE-2026-89680— nfsd: fix nfsd_file leak on inter-server COPY setup failure

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux 内核中修复了以下漏洞： nfsd：修复互服 COPY 设置失败时的 nfsd_file 泄漏问题 当 失败时， 直接返回 ，从而跳过了 标签处本应执行的 。该函数本用于释放由 获取的 引用。因此，每次互服 COPY 失败都会导致一个 泄漏，进而使得关联的文件、inode、dentry 和 vfsmount 被长期“钉住”（无法回收）。 修复方式： 修改 的逻辑，在 失败时，先设置 ，然后跳转到 标签处执行清理逻辑，而不是直接返回。

AI Predicted 4.4 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1583.001 · Domains

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux ce0887ac96d35c7105090e166bb0807dc0a0e838< 1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab affected
ce0887ac96d35c7105090e166bb0807dc0a0e838< 424d5c95108a4809b832cb0a312c61de4aec0078 affected
ce0887ac96d35c7105090e166bb0807dc0a0e838< 6ed8d6de7ec90c4ba84eb82673058f506e5777fd affected
ce0887ac96d35c7105090e166bb0807dc0a0e838< 88a76145451d703eedd867b5989bf73d17340399 affected
5.6 affected
< 5.6 unaffected
6.12.109≤ 6.12.* unaffected
6.18.50≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-89680

Vulnerability Information
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Vulnerability Title
nfsd: fix nfsd_file leak on inter-server COPY setup failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix nfsd_file leak on inter-server COPY setup failure When nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns nfserr_offload_denied directly, bypassing the out: label where release_copy_files() would drop the nf_dst reference taken by nfs4_preprocess_stateid_op(). Each failed inter-server COPY leaks one nfsd_file, pinning file/inode/dentry/vfsmount. Fix by setting status and jumping to out: instead of returning directly.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux ce0887ac96d35c7105090e166bb0807dc0a0e838 ~ 1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-89680

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III. Intelligence Information for CVE-2026-89680

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Patches & Fixes for CVE-2026-89680 (4)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89491 ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin()
CVE-2026-89477 sctp: fix NULL deref on untransmitted RECONF completion
CVE-2026-89478 sctp: drop a chunk if its transport was removed
CVE-2026-89479 sctp: stop processing a packet once its association is deleted
CVE-2026-89480 nvme-tcp: reject a read that transferred too few bytes
CVE-2026-89482 nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89481 nvme-tcp: fix host memory disclosure on R2T for a read command
CVE-2026-89483 nvme: zero the discard fallback page
CVE-2026-89484 lockd: fix NULL dereference on lockowner allocation failure
CVE-2026-89485 lockd: pin next file across nlm_inspect_file lock-drop
CVE-2026-89486 ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user()
CVE-2026-89487 openvswitch: only skb_tx_error() a packet we are about to drop
CVE-2026-89488 openvswitch: Fix CT limit teardown use-after-free
CVE-2026-89489 openrisc: fix arbitrary kernel memory access via or1k_atomic syscall
CVE-2026-89500 ring-buffer: Make cpu_buffer::free_page a buffer_data_read_page
CVE-2026-89497 orangefs: skip leading spaces before parsing client debug masks
CVE-2026-89498 orangefs: fix double-free of trailer_buf on readdir copy failure
CVE-2026-89499 ring-buffer: Stop remote reader update when page swap fails
CVE-2026-89496 ocfs2: always run deallocs on copy-on-write completion
CVE-2026-89501 ring-buffer: Hold cpu_buffer::lock when resizing a subbuf

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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