CVE-2025-68188 (GCVE-0-2025-68188)
Vulnerability from cvelistv5 – Published: 2025-12-16 13:43 – Updated: 2026-05-11 21:48
VLAI
EPSS
VEX
Title
tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()
Summary
In the Linux kernel, the following vulnerability has been resolved:
tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()
Use RCU to avoid a pair of atomic operations and a potential
UAF on dst_dev()->flags.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 , < bc2b881a0896c111c1041d8bb1f92a3b3873ace5
(git)
Affected: cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 , < 06da08d9355bf8e2070459bbedbe372ccc02cc0e (git) Affected: cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 , < b62a59c18b692f892dcb8109c1c2e653b2abc95c (git) |
guessed | |
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (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/tcp_fastopen.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "cf1ef3f0719b4dcb74810ed507e2a2540f9811b4",
"versionType": "git"
},
{
"lessThan": "06da08d9355bf8e2070459bbedbe372ccc02cc0e",
"status": "affected",
"version": "cf1ef3f0719b4dcb74810ed507e2a2540f9811b4",
"versionType": "git"
},
{
"lessThan": "b62a59c18b692f892dcb8109c1c2e653b2abc95c",
"status": "affected",
"version": "cf1ef3f0719b4dcb74810ed507e2a2540f9811b4",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/ipv4/tcp_fastopen.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"lessThan": "4.12",
"status": "unaffected",
"version": "0",
"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": "6.12.58",
"versionStartIncluding": "4.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17.8",
"versionStartIncluding": "4.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18",
"versionStartIncluding": "4.12",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()\n\nUse RCU to avoid a pair of atomic operations and a potential\nUAF on dst_dev()-\u003eflags."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:48:21.833Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bc2b881a0896c111c1041d8bb1f92a3b3873ace5"
},
{
"url": "https://git.kernel.org/stable/c/06da08d9355bf8e2070459bbedbe372ccc02cc0e"
},
{
"url": "https://git.kernel.org/stable/c/b62a59c18b692f892dcb8109c1c2e653b2abc95c"
}
],
"title": "tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-68188",
"datePublished": "2025-12-16T13:43:10.680Z",
"dateReserved": "2025-12-16T13:41:40.252Z",
"dateUpdated": "2026-05-11T21:48:21.833Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-68188",
"date": "2026-09-21",
"epss": "0.00199",
"percentile": "0.09967"
},
"microsoft_vex": {
"current_release_date": "2026-09-12T01:46:16.000Z",
"cve": "CVE-2025-68188",
"id": "msrc_CVE-2025-68188",
"initial_release_date": "2025-12-17T01:05:25.000Z",
"product_status:known_affected": "15",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-68188.json",
"version": "17"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/ipv4/tcp_fastopen.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "bc2b881a0896c111c1041d8bb1f92a3b3873ace5",
"status": "affected",
"version": "cf1ef3f0719b4dcb74810ed507e2a2540f9811b4",
"versionType": "git"
},
{
"lessThan": "06da08d9355bf8e2070459bbedbe372ccc02cc0e",
"status": "affected",
"version": "cf1ef3f0719b4dcb74810ed507e2a2540f9811b4",
"versionType": "git"
},
{
"lessThan": "b62a59c18b692f892dcb8109c1c2e653b2abc95c",
"status": "affected",
"version": "cf1ef3f0719b4dcb74810ed507e2a2540f9811b4",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/ipv4/tcp_fastopen.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"lessThan": "4.12",
"status": "unaffected",
"version": "0",
"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\ntcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()\n\nUse RCU to avoid a pair of atomic operations and a potential\nUAF on dst_dev()-\u003eflags."
}
],
"id": "CVE-2025-68188",
"lastModified": "2026-06-17T09:58:42.410",
"metrics": {},
"published": "2025-12-16T14:15:51.460",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/06da08d9355bf8e2070459bbedbe372ccc02cc0e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b62a59c18b692f892dcb8109c1c2e653b2abc95c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/bc2b881a0896c111c1041d8bb1f92a3b3873ace5"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T01:39:00+00:00",
"cve": "CVE-2025-68188",
"id": "CVE-2025-68188",
"initial_release_date": "2025-12-16T00:00:00+00:00",
"product_status:known_affected": "260",
"product_status:known_not_affected": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68188.json",
"version": "3"
}
}
}
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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.
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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.
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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.
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