ubuntu-cve-2021-3826
Vulnerability from osv_ubuntu
Published
2022-09-01 21:15
Modified
2026-05-20 14:52
Summary
Details
Heap/stack buffer overflow in the dlang_lname function in d-demangle.c in libiberty allows attackers to potentially cause a denial of service (segmentation fault and crash) via a crafted mangled symbol.
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
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"binary_name": "gnat-11",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "gobjc++-11",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "gobjc++-11-multilib",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "gobjc-11",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "gobjc-11-multilib",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "lib32asan6",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "lib32go19",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "lib32gphobos2",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "lib64asan6",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "lib64go19",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "lib64gphobos2",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libasan6",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libgnat-11",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libgo19",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libgphobos2",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libstdc++-11-pic",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libtsan0",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libx32asan6",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libx32go19",
"binary_version": "11.5.0-11ubuntu2"
},
{
"binary_name": "libx32gphobos2",
"binary_version": "11.5.0-11ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "gcc-11",
"purl": "pkg:deb/ubuntu/gcc-11@11.5.0-11ubuntu2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"11.5.0-7ubuntu1",
"11.5.0-7ubuntu2",
"11.5.0-8ubuntu1",
"11.5.0-9ubuntu1",
"11.5.0-10ubuntu1",
"11.5.0-11ubuntu2"
]
}
],
"aliases": [],
"details": "Heap/stack buffer overflow in the dlang_lname function in d-demangle.c in libiberty allows attackers to potentially cause a denial of service (segmentation fault and crash) via a crafted mangled symbol.",
"id": "UBUNTU-CVE-2021-3826",
"modified": "2026-05-20T14:52:57Z",
"published": "2022-09-01T21:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3826"
},
{
"type": "REPORT",
"url": "https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987"
},
{
"type": "REPORT",
"url": "https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=5481040197402be6dfee265bd2ff5a4c88e30505"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3826"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-3826"
]
}
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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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