GHSA-JR2F-554P-CMVR
Vulnerability from github – Published: 2025-04-16 15:34 – Updated: 2025-11-03 21:33In 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.
{
"affected": [],
"aliases": [
"CVE-2025-22025"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-16T15:15:55Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: put dl_stid if fail to queue dl_recall\n\nBefore calling nfsd4_run_cb to queue dl_recall to the callback_wq, we\nincrement the reference count of dl_stid.\nWe expect that after the corresponding work_struct is processed, the\nreference count of dl_stid will be decremented through the callback\nfunction nfsd4_cb_recall_release.\nHowever, if the call to nfsd4_run_cb fails, the incremented reference\ncount of dl_stid will not be decremented correspondingly, leading to the\nfollowing nfs4_stid leak:\nunreferenced object 0xffff88812067b578 (size 344):\n comm \"nfsd\", pid 2761, jiffies 4295044002 (age 5541.241s)\n hex dump (first 32 bytes):\n 01 00 00 00 6b 6b 6b 6b b8 02 c0 e2 81 88 ff ff ....kkkk........\n 00 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 ad 4e ad de .kkkkkkk.....N..\n backtrace:\n kmem_cache_alloc+0x4b9/0x700\n nfsd4_process_open1+0x34/0x300\n nfsd4_open+0x2d1/0x9d0\n nfsd4_proc_compound+0x7a2/0xe30\n nfsd_dispatch+0x241/0x3e0\n svc_process_common+0x5d3/0xcc0\n svc_process+0x2a3/0x320\n nfsd+0x180/0x2e0\n kthread+0x199/0x1d0\n ret_from_fork+0x30/0x50\n ret_from_fork_asm+0x1b/0x30\nunreferenced object 0xffff8881499f4d28 (size 368):\n comm \"nfsd\", pid 2761, jiffies 4295044005 (age 5541.239s)\n hex dump (first 32 bytes):\n 01 00 00 00 00 00 00 00 30 4d 9f 49 81 88 ff ff ........0M.I....\n 30 4d 9f 49 81 88 ff ff 20 00 00 00 01 00 00 00 0M.I.... .......\n backtrace:\n kmem_cache_alloc+0x4b9/0x700\n nfs4_alloc_stid+0x29/0x210\n alloc_init_deleg+0x92/0x2e0\n nfs4_set_delegation+0x284/0xc00\n nfs4_open_delegation+0x216/0x3f0\n nfsd4_process_open2+0x2b3/0xee0\n nfsd4_open+0x770/0x9d0\n nfsd4_proc_compound+0x7a2/0xe30\n nfsd_dispatch+0x241/0x3e0\n svc_process_common+0x5d3/0xcc0\n svc_process+0x2a3/0x320\n nfsd+0x180/0x2e0\n kthread+0x199/0x1d0\n ret_from_fork+0x30/0x50\n ret_from_fork_asm+0x1b/0x30\nFix it by checking the result of nfsd4_run_cb and call nfs4_put_stid if\nfail to queue dl_recall.",
"id": "GHSA-jr2f-554p-cmvr",
"modified": "2025-11-03T21:33:34Z",
"published": "2025-04-16T15:34:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22025"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/133f5e2a37ce08c82d24e8fba65e0a81deae4609"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/230ca758453c63bd38e4d9f4a21db698f7abada8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/63b91c8ff4589f5263873b24c052447a28e10ef7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b874cdef4e67e5150e07eff0eae1cbb21fb92da1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cad3479b63661a399c9df1d0b759e1806e2df3c8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdb796137c57e68ca34518d53be53b679351eb86"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d96587cc93ec369031bcd7658c6adc719873c9fd"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.