CVE-2025-21955
- Source
- https://cve.org/CVERecord?id=CVE-2025-21955
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21955.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-21955
- Downstream
- Related
- Published
- 2025-04-01T15:46:55.724Z
- Modified
- 2026-03-12T19:49:47.485200Z
- Summary
- ksmbd: prevent connection release during oplock break notification
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: prevent connection release during oplock break notification
ksmbdwork could be freed when after connection release. Increment rcount of ksmbd_conn to indicate that requests are not finished yet and to not release the connection.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21955.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/09aeab68033161cb54f194da93e51a11aee6144b
- https://git.kernel.org/stable/c/3aa660c059240e0c795217182cf7df32909dd917
- https://git.kernel.org/stable/c/a4261bbc33fbf99b99c80aa3a2c5097611802980
- https://git.kernel.org/stable/c/f17d1c63a76b0fe8e9c78023a86507a3a6d62cfa
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21955.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-21955
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0626e6641f6b467447c81dd7678a69c66f7746cfFixed09aeab68033161cb54f194da93e51a11aee6144bFixeda4261bbc33fbf99b99c80aa3a2c5097611802980Fixedf17d1c63a76b0fe8e9c78023a86507a3a6d62cfaFixed3aa660c059240e0c795217182cf7df32909dd917
Affected versions
v5.*
v5.13
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.12
v6.12-rc1
v6.12-rc2
v6.12-rc3
v6.12-rc4
v6.12-rc5
v6.12-rc6
v6.12-rc7
v6.12.1
v6.12.10
v6.12.11
v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.18
v6.12.19
v6.12.2
v6.12.3
v6.12.4
v6.12.5
v6.12.6
v6.12.7
v6.12.8
v6.12.9
v6.13
v6.13-rc1
v6.13-rc2
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.13.1
v6.13.2
v6.13.3
v6.13.4
v6.13.5
v6.13.6
v6.13.7
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
v6.14-rc6
v6.2
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4
v6.2-rc5
v6.2-rc6
v6.2-rc7
v6.2-rc8
v6.3
v6.3-rc1
v6.3-rc2
v6.3-rc3
v6.3-rc4
v6.3-rc5
v6.3-rc6
v6.3-rc7
v6.4
v6.4-rc1
v6.4-rc2
v6.4-rc3
v6.4-rc4
v6.4-rc5
v6.4-rc6
v6.4-rc7
v6.5
v6.5-rc1
v6.5-rc2
v6.5-rc3
v6.5-rc4
v6.5-rc5
v6.5-rc6
v6.5-rc7
v6.6
v6.6-rc1
v6.6-rc2
v6.6-rc3
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.6.1
v6.6.10
v6.6.11
v6.6.12
v6.6.13
v6.6.14
v6.6.15
v6.6.16
v6.6.17
v6.6.18
v6.6.19
v6.6.2
v6.6.20
v6.6.21
v6.6.22
v6.6.23
v6.6.24
v6.6.25
v6.6.26
v6.6.27
v6.6.28
v6.6.29
v6.6.3
v6.6.30
v6.6.31
v6.6.32
v6.6.33
v6.6.34
v6.6.35
v6.6.36
v6.6.37
v6.6.38
v6.6.39
v6.6.4
v6.6.40
v6.6.41
v6.6.42
v6.6.43
v6.6.44
v6.6.45
v6.6.46
v6.6.47
v6.6.48
v6.6.49
v6.6.5
v6.6.50
v6.6.51
v6.6.52
v6.6.53
v6.6.54
v6.6.55
v6.6.56
v6.6.57
v6.6.58
v6.6.59
v6.6.6
v6.6.60
v6.6.61
v6.6.62
v6.6.63
v6.6.64
v6.6.65
v6.6.66
v6.6.67
v6.6.68
v6.6.69
v6.6.7
v6.6.70
v6.6.71
v6.6.72
v6.6.73
v6.6.74
v6.6.75
v6.6.76
v6.6.77
v6.6.78
v6.6.79
v6.6.8
v6.6.80
v6.6.81
v6.6.82
v6.6.83
v6.6.9
v6.7
v6.7-rc1
v6.7-rc2
v6.7-rc3
v6.7-rc4
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21955.json"
vanir_signatures
[
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/connection.h"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"line_hashes": [
"170678115675254683693164397960212957327",
"159723105329707252656082168670198158698",
"338874609949234273217739293790110881887",
"130711997165515123872420251255458736510"
],
"threshold": 0.9
},
"id": "CVE-2025-21955-21ac8438",
"signature_type": "Line"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/oplock.c",
"function": "smb2_lease_break_noti"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"function_hash": "164585460595117285577181523608311399830",
"length": 950.0
},
"id": "CVE-2025-21955-27a828b0",
"signature_type": "Function"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/server.c",
"function": "queue_ksmbd_work"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"function_hash": "186124402163900546262731810105389686042",
"length": 481.0
},
"id": "CVE-2025-21955-36573dc3",
"signature_type": "Function"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/oplock.c",
"function": "__smb2_lease_break_noti"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"function_hash": "189871104780197061278408428471642967452",
"length": 1434.0
},
"id": "CVE-2025-21955-b8dc3442",
"signature_type": "Function"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/server.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"line_hashes": [
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"265082637484653847725543618915219594662",
"196147967361927976796283213332456903107",
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"50142168858238336546444821560563413988",
"222552381686016628185807802274408652556"
],
"threshold": 0.9
},
"id": "CVE-2025-21955-ba1afa46",
"signature_type": "Line"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/server.c",
"function": "handle_ksmbd_work"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"function_hash": "93551861298450331464241622300808793388",
"length": 457.0
},
"id": "CVE-2025-21955-d24d4bbb",
"signature_type": "Function"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/connection.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"line_hashes": [
"147356175124840709475528598533124139779",
"69370719159557536462009041873569636922",
"69025421416136139713897350557121533230"
],
"threshold": 0.9
},
"id": "CVE-2025-21955-e740aad6",
"signature_type": "Line"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/oplock.c",
"function": "smb2_oplock_break_noti"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"function_hash": "132233685841330436807972655482111348722",
"length": 722.0
},
"id": "CVE-2025-21955-ec5ead69",
"signature_type": "Function"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/oplock.c",
"function": "__smb2_oplock_break_noti"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"function_hash": "90054105818488538989147583110864838168",
"length": 1609.0
},
"id": "CVE-2025-21955-f421128b",
"signature_type": "Function"
},
{
"signature_version": "v1",
"target": {
"file": "fs/smb/server/oplock.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@09aeab68033161cb54f194da93e51a11aee6144b",
"deprecated": false,
"digest": {
"line_hashes": [
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"301521491174255471068965116534399036722",
"265973740176055143140201934113091771113",
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"73555576943698304245074489207710835181",
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"161717901462460989345275464861729461146",
"248710358951402073387726069690115518705"
],
"threshold": 0.9
},
"id": "CVE-2025-21955-fc2bede1",
"signature_type": "Line"
}
]