CVE-2023-3812 (GCVE-0-2023-3812)
Vulnerability from cvelistv5
Published
2023-07-24 15:19
Modified
2025-11-06 21:00
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-787 - Out-of-bounds Write
Summary
An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.
References
Impacted products
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| ► | Red Hat | Red Hat Enterprise Linux 8 |
Unaffected: 0:4.18.0-513.9.1.rt7.311.el8_9 < * cpe:/a:redhat:enterprise_linux:8::nfv cpe:/a:redhat:enterprise_linux:8::realtime |
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Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An out-of-bounds memory access flaw was found in the Linux kernel\\u2019s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2025-11-06T21:00:37.422Z\"}, \"x_redhatCweChain\": \"(CWE-416|CWE-787): Use After Free or Out-of-bounds Write\"}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-3812\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-06T21:00:37.422Z\", \"dateReserved\": \"2023-07-20T13:02:44.826Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2023-07-24T15:19:21.817Z\", \"assignerShortName\": \"redhat\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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