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CVE-2026-22989— nfsd: check that server is running in unlock_filesystem

EPSS 0.02% · P5
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I. Basic Information for CVE-2026-22989

Vulnerability Information
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Vulnerability Title
nfsd: check that server is running in unlock_filesystem
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfsd: check that server is running in unlock_filesystem If we are trying to unlock the filesystem via an administrative interface and nfsd isn't running, it crashes the server. This happens currently because nfsd4_revoke_states() access state structures (eg., conf_id_hashtbl) that has been freed as a part of the server shutdown. [ 59.465072] Call trace: [ 59.465308] nfsd4_revoke_states+0x1b4/0x898 [nfsd] (P) [ 59.465830] write_unlock_fs+0x258/0x440 [nfsd] [ 59.466278] nfsctl_transaction_write+0xb0/0x120 [nfsd] [ 59.466780] vfs_write+0x1f0/0x938 [ 59.467088] ksys_write+0xfc/0x1f8 [ 59.467395] __arm64_sys_write+0x74/0xb8 [ 59.467746] invoke_syscall.constprop.0+0xdc/0x1e8 [ 59.468177] do_el0_svc+0x154/0x1d8 [ 59.468489] el0_svc+0x40/0xe0 [ 59.468767] el0t_64_sync_handler+0xa0/0xe8 [ 59.469138] el0t_64_sync+0x1ac/0x1b0 Ensure this can't happen by taking the nfsd_mutex and checking that the server is still up, and then holding the mutex across the call to nfsd4_revoke_states().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于unlock_filesystem未检查服务器是否运行，可能导致崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1ac3629bf012592cb0320e52a1cceb319a05ad17 ~ d95499900fe52f3d461ed26b7a30bebea8f12914 -
LinuxLinux 6.9 -

II. Public POCs for CVE-2026-22989

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III. Intelligence Information for CVE-2026-22989

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Same Patch Batch · Linux · 2026-01-23 · 34 CVEs total

CVE-2026-229849.8 CRITICALlibceph: prevent potential out-of-bounds reads in handle_auth_done()
CVE-2026-229807.8 HIGHnfsd: provide locking for v4_end_grace
CVE-2026-229887.8 HIGHarp: do not assume dev_hard_header() does not change skb->head
CVE-2026-229927.5 HIGHlibceph: return the handler error from mon_handle_auth_done()
CVE-2026-229917.5 HIGHlibceph: make free_choose_arg_map() resilient to partial allocation
CVE-2026-229907.5 HIGHlibceph: replace overzealous BUG_ON in osdmap_apply_incremental()
CVE-2026-22987net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
CVE-2026-22979net: fix memory leak in skb_segment_list for GRO packets
CVE-2026-22981idpf: detach and close netdevs while handling a reset
CVE-2026-22982net: mscc: ocelot: Fix crash when adding interface under a lag
CVE-2026-22983net: do not write to msg_get_inq in callee
CVE-2026-22985idpf: Fix RSS LUT NULL pointer crash on early ethtool operations
CVE-2026-22986gpiolib: fix race condition for gdev->srcu
CVE-2026-22978wifi: avoid kernel-infoleak from struct iw_point
CVE-2026-22993idpf: Fix RSS LUT NULL ptr issue after soft reset
CVE-2026-22994bpf: Fix reference count leak in bpf_prog_test_run_xdp()
CVE-2026-22995ublk: fix use-after-free in ublk_partition_scan_work
CVE-2025-71145usb: phy: isp1301: fix non-OF device reference imbalance
CVE-2025-71161dm-verity: disable recursive forward error correction
CVE-2025-71160netfilter: nf_tables: avoid chain re-validation if possible

Showing top 20 of 34 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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