CVE-2019-25160 (GCVE-0-2019-25160)
Vulnerability from cvelistv5 – Published: 2024-02-26 17:20 – Updated: 2026-08-05 08:43
VLAI
EPSS
VEX
Title
netlabel: fix out-of-bounds memory accesses
Summary
In the Linux kernel, the following vulnerability has been resolved:
netlabel: fix out-of-bounds memory accesses
There are two array out-of-bounds memory accesses, one in
cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both
errors are embarassingly simple, and the fixes are straightforward.
As a FYI for anyone backporting this patch to kernels prior to v4.8,
you'll want to apply the netlbl_bitmap_walk() patch to
cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before
Linux v4.8.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-02-27 16:02 UTC
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < 97bc3683c24999ee621d847c9348c75d2fe86272
(git)
Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < c61d01faa5550e06794dcf86125ccd325bfad950 (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < dc18101f95fa6e815f426316b8b9a5cee28a334e (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < 1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000 (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < fcfe700acdc1c72eab231300e82b962bac2b2b2c (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < e3713abc4248aa6bcc11173d754c418b02a62cbb (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < fbf9578919d6c91100ec63acf2cba641383f6c78 (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < 5578de4834fe0f2a34fedc7374be691443396d1f (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.19
Unaffected: 0 , < 2.6.19 (semver) Unaffected: 3.16.66 , ≤ 3.16.* (semver) Unaffected: 3.18.137 , ≤ 3.18.* (semver) Unaffected: 4.4.177 , ≤ 4.4.* (semver) Unaffected: 4.9.163 , ≤ 4.9.* (semver) Unaffected: 4.14.106 , ≤ 4.14.* (semver) Unaffected: 4.19.28 , ≤ 4.19.* (semver) Unaffected: 4.20.15 , ≤ 4.20.* (semver) Unaffected: 5.0 , ≤ * (original_commit_for_fix) |
guessed |
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.19"
},
{
"lessThan": "2.6.19",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "3.16.*",
"status": "unaffected",
"version": "3.16.66",
"versionType": "semver"
},
{
"lessThanOrEqual": "3.18.*",
"status": "unaffected",
"version": "3.18.137",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.4.*",
"status": "unaffected",
"version": "4.4.177",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.106",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.28",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.20.*",
"status": "unaffected",
"version": "4.20.15",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.16.66",
"versionStartIncluding": "2.6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.18.137",
"versionStartIncluding": "2.6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.4.177",
"versionStartIncluding": "2.6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.14.106",
"versionStartIncluding": "2.6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.19.28",
"versionStartIncluding": "2.6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "5.0",
"versionStartIncluding": "2.6.19",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlabel: fix out-of-bounds memory accesses\n\nThere are two array out-of-bounds memory accesses, one in\ncipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both\nerrors are embarassingly simple, and the fixes are straightforward.\n\nAs a FYI for anyone backporting this patch to kernels prior to v4.8,\nyou\u0027ll want to apply the netlbl_bitmap_walk() patch to\ncipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn\u0027t exist before\nLinux v4.8."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - Crafted IPv4 packets with CIPSO options reach the bug via ip_rcv_finish_core -\u003e ip_rcv_options -\u003e ip_options_compile -\u003e cipso_v4_validate -\u003e cipso_v4_map_lvl_valid/netlbl_bitmap_walk, with no local access required. This is a net/ stack path processing remote peer packet data.\nAC:L - With a CIPSO MAP_TRANS DOI configured (the labeled-networking deployment this subsystem targets), an attacker reliably triggers the OOB by setting an out-of-range level byte or category bitmap; DOI values are probeable via ICMP parameter-problem offsets. No race or other attacker-uncontrollable condition is required.\nPR:N - Incoming skbs take the CIPSO path in __ip_options_compile without CAP_NET_RAW or any authentication; the privilege check applies only when skb is NULL (setsockopt). A remote unauthenticated sender can trigger the vulnerable validation.\nUI:N - Exploitation requires only sending crafted IP packets to the host; no victim user action is needed.\nS:U - Impact is confined to the receiving kernel\u0027s NetLabel/CIPSO processing and memory; there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - cipso_v4_map_lvl_valid indexes an attacker-controlled u8 into the DOI level array without a size check, enabling a large kernel heap OOB read (up to ~1KB when cipso_size is small). Per guidance, unbounded OOB reads score Confidentiality High.\nI:N - Both defects are out-of-bounds reads with no write, UAF, or control-flow corruption primitive; later map_lvl_ntoh still bounds-checks before applying labels, so there is no integrity impact.\nA:H - The OOB reads can fault on unmapped pages and cause a kernel oops/panic, and a remote attacker can trigger them repeatedly for DoS against CIPSO-enabled hosts."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T08:43:45.278Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/97bc3683c24999ee621d847c9348c75d2fe86272"
},
{
"url": "https://git.kernel.org/stable/c/c61d01faa5550e06794dcf86125ccd325bfad950"
},
{
"url": "https://git.kernel.org/stable/c/dc18101f95fa6e815f426316b8b9a5cee28a334e"
},
{
"url": "https://git.kernel.org/stable/c/1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000"
},
{
"url": "https://git.kernel.org/stable/c/fcfe700acdc1c72eab231300e82b962bac2b2b2c"
},
{
"url": "https://git.kernel.org/stable/c/e3713abc4248aa6bcc11173d754c418b02a62cbb"
},
{
"url": "https://git.kernel.org/stable/c/fbf9578919d6c91100ec63acf2cba641383f6c78"
},
{
"url": "https://git.kernel.org/stable/c/5578de4834fe0f2a34fedc7374be691443396d1f"
}
],
"title": "netlabel: fix out-of-bounds memory accesses",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2019-25160",
"datePublished": "2024-02-26T17:20:19.490Z",
"dateReserved": "2024-02-26T17:07:20.465Z",
"dateUpdated": "2026-08-05T08:43:45.278Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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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