CVE-2025-68191 (GCVE-0-2025-68191)
Vulnerability from cvelistv5 – Published: 2025-12-16 13:43 – Updated: 2026-05-11 21:48
VLAI
EPSS
VEX
Title
udp_tunnel: use netdev_warn() instead of netdev_WARN()
Summary
In the Linux kernel, the following vulnerability has been resolved:
udp_tunnel: use netdev_warn() instead of netdev_WARN()
netdev_WARN() uses WARN/WARN_ON to print a backtrace along with
file and line information. In this case, udp_tunnel_nic_register()
returning an error is just a failed operation, not a kernel bug.
udp_tunnel_nic_register() can fail due to a memory allocation
failure (kzalloc() or udp_tunnel_nic_alloc()).
This is a normal runtime error and not a kernel bug.
Replace netdev_WARN() with netdev_warn() accordingly.
Severity
No CVSS data available.
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
cc4e3835eff474aa274d6e1d18f69d9d296d3b76 , < 087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0
(git)
Affected: cc4e3835eff474aa274d6e1d18f69d9d296d3b76 , < 45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4 (git) Affected: cc4e3835eff474aa274d6e1d18f69d9d296d3b76 , < 7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba (git) Affected: cc4e3835eff474aa274d6e1d18f69d9d296d3b76 , < c018a87942bf1607aeebf8dba5a210ca9a09a0fd (git) Affected: cc4e3835eff474aa274d6e1d18f69d9d296d3b76 , < 51b3033088f0420b19027e3d54cd989b6ebd987e (git) Affected: cc4e3835eff474aa274d6e1d18f69d9d296d3b76 , < 3c3b148bf8384c8a787753cf20abde1c5731f97f (git) Affected: cc4e3835eff474aa274d6e1d18f69d9d296d3b76 , < dc2f650f7e6857bf384069c1a56b2937a1ee370d (git) |
guessed | |
| Linux | Linux |
Affected:
5.9
Unaffected: 0 , < 5.9 (semver) Unaffected: 5.10.247 , ≤ 5.10.* (semver) Unaffected: 5.15.197 , ≤ 5.15.* (semver) Unaffected: 6.1.159 , ≤ 6.1.* (semver) Unaffected: 6.6.117 , ≤ 6.6.* (semver) Unaffected: 6.12.58 , ≤ 6.12.* (semver) Unaffected: 6.17.8 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/ipv4/udp_tunnel_nic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "c018a87942bf1607aeebf8dba5a210ca9a09a0fd",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "51b3033088f0420b19027e3d54cd989b6ebd987e",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "3c3b148bf8384c8a787753cf20abde1c5731f97f",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "dc2f650f7e6857bf384069c1a56b2937a1ee370d",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/ipv4/udp_tunnel_nic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"lessThan": "5.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.247",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.197",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.117",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.58",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.247",
"versionStartIncluding": "5.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.197",
"versionStartIncluding": "5.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.159",
"versionStartIncluding": "5.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.117",
"versionStartIncluding": "5.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.58",
"versionStartIncluding": "5.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17.8",
"versionStartIncluding": "5.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18",
"versionStartIncluding": "5.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp_tunnel: use netdev_warn() instead of netdev_WARN()\n\nnetdev_WARN() uses WARN/WARN_ON to print a backtrace along with\nfile and line information. In this case, udp_tunnel_nic_register()\nreturning an error is just a failed operation, not a kernel bug.\n\nudp_tunnel_nic_register() can fail due to a memory allocation\nfailure (kzalloc() or udp_tunnel_nic_alloc()).\nThis is a normal runtime error and not a kernel bug.\n\nReplace netdev_WARN() with netdev_warn() accordingly."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:48:25.272Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0"
},
{
"url": "https://git.kernel.org/stable/c/45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4"
},
{
"url": "https://git.kernel.org/stable/c/7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba"
},
{
"url": "https://git.kernel.org/stable/c/c018a87942bf1607aeebf8dba5a210ca9a09a0fd"
},
{
"url": "https://git.kernel.org/stable/c/51b3033088f0420b19027e3d54cd989b6ebd987e"
},
{
"url": "https://git.kernel.org/stable/c/3c3b148bf8384c8a787753cf20abde1c5731f97f"
},
{
"url": "https://git.kernel.org/stable/c/dc2f650f7e6857bf384069c1a56b2937a1ee370d"
}
],
"title": "udp_tunnel: use netdev_warn() instead of netdev_WARN()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-68191",
"datePublished": "2025-12-16T13:43:13.146Z",
"dateReserved": "2025-12-16T13:41:40.253Z",
"dateUpdated": "2026-05-11T21:48:25.272Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-68191",
"date": "2026-09-21",
"epss": "0.00207",
"percentile": "0.11091"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/ipv4/udp_tunnel_nic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "c018a87942bf1607aeebf8dba5a210ca9a09a0fd",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "51b3033088f0420b19027e3d54cd989b6ebd987e",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "3c3b148bf8384c8a787753cf20abde1c5731f97f",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
},
{
"lessThan": "dc2f650f7e6857bf384069c1a56b2937a1ee370d",
"status": "affected",
"version": "cc4e3835eff474aa274d6e1d18f69d9d296d3b76",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/ipv4/udp_tunnel_nic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"lessThan": "5.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.247",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.197",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.117",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.58",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp_tunnel: use netdev_warn() instead of netdev_WARN()\n\nnetdev_WARN() uses WARN/WARN_ON to print a backtrace along with\nfile and line information. In this case, udp_tunnel_nic_register()\nreturning an error is just a failed operation, not a kernel bug.\n\nudp_tunnel_nic_register() can fail due to a memory allocation\nfailure (kzalloc() or udp_tunnel_nic_alloc()).\nThis is a normal runtime error and not a kernel bug.\n\nReplace netdev_WARN() with netdev_warn() accordingly."
}
],
"id": "CVE-2025-68191",
"lastModified": "2026-06-17T09:58:42.680",
"metrics": {},
"published": "2025-12-16T14:15:51.790",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3c3b148bf8384c8a787753cf20abde1c5731f97f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/51b3033088f0420b19027e3d54cd989b6ebd987e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c018a87942bf1607aeebf8dba5a210ca9a09a0fd"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/dc2f650f7e6857bf384069c1a56b2937a1ee370d"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-06-29T20:45:28+00:00",
"cve": "CVE-2025-68191",
"id": "CVE-2025-68191",
"initial_release_date": "2025-12-16T00:00:00+00:00",
"product_status:known_affected": "232",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: udp_tunnel: use netdev_warn() instead of netdev_WARN()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68191.json",
"version": "3"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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.
Loading…
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.
Loading…