CVE-2025-22025nfsd: put dl_stid if fail to queue dl_recall
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: nfsd: put dl_stid if fail to queue dl_recall Before calling nfsd4_run_cb to queue dl_recall to the callback_wq, we increment the reference count of dl_stid. We expect that after the corresponding work_struct is processed, the reference count of dl_stid will be decremented through the callback function nfsd4_cb_recall_release. However, if the call to nfsd4_run_cb fails, the incremented reference count of dl_stid will not be decremented correspondingly, leading to the following nfs4_stid leak: unreferenced object 0xffff88812067b578 (size 344): comm "nfsd", pid 2761, jiffies 4295044002 (age 5541.241s) hex dump (first 32 bytes): 01 00 00 00 6b 6b 6b 6b b8 02 c0 e2 81 88 ff ff ....kkkk........ 00 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 ad 4e ad de .kkkkkkk.....N.. backtrace: kmem_cache_alloc+0x4b9/0x700 nfsd4_process_open1+0x34/0x300 nfsd4_open+0x2d1/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 unreferenced object 0xffff8881499f4d28 (size 368): comm "nfsd", pid 2761, jiffies 4295044005 (age 5541.239s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 30 4d 9f 49 81 88 ff ff ........0M.I.... 30 4d 9f 49 81 88 ff ff 20 00 00 00 01 00 00 00 0M.I.... ....... backtrace: kmem_cache_alloc+0x4b9/0x700 nfs4_alloc_stid+0x29/0x210 alloc_init_deleg+0x92/0x2e0 nfs4_set_delegation+0x284/0xc00 nfs4_open_delegation+0x216/0x3f0 nfsd4_process_open2+0x2b3/0xee0 nfsd4_open+0x770/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 Fix it by checking the result of nfsd4_run_cb and call nfs4_put_stid if fail to queue dl_recall.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before b874cdef4e67e5150e07eff0eae1cbb21fb92da1; from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before cdb796137c57e68ca34518d53be53b679351eb86; from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before d96587cc93ec369031bcd7658c6adc719873c9fd; from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before 9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1; from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before cad3479b63661a399c9df1d0b759e1806e2df3c8; from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before 63b91c8ff4589f5263873b24c052447a28e10ef7; from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before 133f5e2a37ce08c82d24e8fba65e0a81deae4609; from b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf before 230ca758453c63bd38e4d9f4a21db698f7abada8 | CNA record |
linux linux_kernel linux:linux_kernel | before 5.10.236; from 5.11 before 5.15.180; from 5.16 before 6.1.134; from 6.2 before 6.6.87; from 6.7 before 6.12.23; from 6.13 before 6.13.11; from 6.14 before 6.14.2 | NVD |
References
- https://git.kernel.org/stable/c/b874cdef4e67e5150e07eff0eae1cbb21fb92da1patch
- https://git.kernel.org/stable/c/cdb796137c57e68ca34518d53be53b679351eb86patch
- https://git.kernel.org/stable/c/d96587cc93ec369031bcd7658c6adc719873c9fdpatch
- https://git.kernel.org/stable/c/9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1patch
- https://git.kernel.org/stable/c/cad3479b63661a399c9df1d0b759e1806e2df3c8patch
- https://git.kernel.org/stable/c/63b91c8ff4589f5263873b24c052447a28e10ef7patch
- https://git.kernel.org/stable/c/133f5e2a37ce08c82d24e8fba65e0a81deae4609patch
- https://git.kernel.org/stable/c/230ca758453c63bd38e4d9f4a21db698f7abada8patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.