FKIE_CVE-2007-3731
Vulnerability from fkie_nvd - Published: 2007-09-17 17:17 - Updated: 2026-06-16 22:42
Severity
Summary
The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | 2.6.20 | |
| linux | linux_kernel | 2.6.21 |
{
"affected": [
{
"affectedData": [
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"product": "n/a",
"vendor": "n/a",
"versions": [
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"status": "affected",
"version": "n/a"
}
]
}
],
"source": "secalert@redhat.com"
}
],
"configurations": [
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"nodes": [
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.20:*:*:*:*:*:*:*",
"matchCriteriaId": "C6940324-0383-4510-BA55-770E0A6B80B7",
"vulnerable": true
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"cveTags": [],
"descriptions": [
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"lang": "en",
"value": "The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function."
},
{
"lang": "es",
"value": "El kernel de Linux 2.6.20 y 2.6.21 no maneja de forma adecuada un segmento de selecci\u00f3n LDT no v\u00e1lido en %cs (el campo xcs)a lo largo de las operaciones paso-simple ptrace, lo caul permite a usuarios loalces provocar denegaci\u00f3n de servicio (referencia NULL y OOPS) a trav\u00e9s de ciertos c\u00f3digos que realizan las respuestas ptrace PTRACE_SETREGS y PTRACE_SINGLESTEP, relacionado con la funci\u00f3n TRACE_IRQS_ON, y posiblemente relacionado con la funci\u00f3n arch_ptrace."
}
],
"id": "CVE-2007-3731",
"lastModified": "2026-06-16T22:42:36.833",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 4.9,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 6.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
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"published": "2007-09-17T17:17:00.000",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
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"url": "http://bugzilla.kernel.org/show_bug.cgi?id=8765"
},
{
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"url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8"
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"url": "http://osvdb.org/37286"
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"url": "http://secunia.com/advisories/26935"
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"url": "http://secunia.com/advisories/26955"
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{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/29159"
},
{
"source": "secalert@redhat.com",
"url": "http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094"
},
{
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"url": "http://www.debian.org/security/2007/dsa-1378"
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{
"source": "secalert@redhat.com",
"url": "http://www.redhat.com/support/errata/RHSA-2007-0940.html"
},
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"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/archive/1/488972/100/0/threaded"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/bid/25801"
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{
"source": "secalert@redhat.com",
"url": "http://www.ubuntu.com/usn/usn-518-1"
},
{
"source": "secalert@redhat.com",
"tags": [
"Patch"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=248324"
},
{
"source": "secalert@redhat.com",
"url": "https://issues.rpath.com/browse/RPL-2304"
},
{
"source": "secalert@redhat.com",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394"
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"url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8"
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"url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://osvdb.org/37286"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/26935"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/26955"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/26978"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/27322"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/29159"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.debian.org/security/2007/dsa-1378"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.redhat.com/support/errata/RHSA-2007-0940.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/488972/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/25801"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ubuntu.com/usn/usn-518-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=248324"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://issues.rpath.com/browse/RPL-2304"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vendorComments": [
{
"comment": "This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, or 4.",
"lastModified": "2007-10-18T00:00:00",
"organization": "Red Hat"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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