ubuntu-cve-2020-8835
Vulnerability from osv_ubuntu
Published
2020-03-30 16:00
Modified
2025-10-24 04:48
Summary
Details
In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)
Severity
7.8 (High)
7.8 (High)
N/A (UNKNOWN)
References
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"purl": "pkg:deb/ubuntu/linux-raspi2@5.4.0-1006.6?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.3.0-1007.8",
"5.3.0-1014.16",
"5.3.0-1015.17",
"5.3.0-1017.19",
"5.4.0-1004.4",
"5.4.0-1006.6"
]
}
],
"aliases": [],
"details": "In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)",
"id": "UBUNTU-CVE-2020-8835",
"modified": "2025-10-24T04:48:20Z",
"published": "2020-03-30T16:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-8835"
},
{
"type": "REPORT",
"url": "https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results"
},
{
"type": "REPORT",
"url": "https://lore.kernel.org/bpf/20200330160324.15259-1-daniel@iogearbox.net/T/"
},
{
"type": "REPORT",
"url": "https://www.openwall.com/lists/oss-security/2020/03/30/3"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4313-1"
},
{
"type": "REPORT",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef"
},
{
"type": "REPORT",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-20-350/"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-8835"
}
],
"related": [
"USN-4313-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-8835"
]
}
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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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