CVE-2020-12465

Kernel memory corruption via unchecked receive fragments

Published Apr 29, 2020 · Updated Aug 4, 2024

Array overflow in the Linux kernel mt76 driver before 5.5.10 allows local users with administrative privileges to corrupt kernel memory. The mt76_add_fragment function passed nr_frags directly as the skb_shared_info frags index without checking the fixed array bound before adding a receive fragment. Administrative privileges and affected MediaTek mt76 wireless hardware are required; corruption can crash the kernel or disclose kernel information.

CVSS severity6.7
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Array overflow in the Linux kernel mt76 driver before 5.5.10 allows local users with administrative privileges to corrupt kernel memory. The mt76_add_fragment function passed nr_frags directly as the skb_shared_info frags index without checking the fixed array bound before adding a receive fragment. Administrative privileges and affected MediaTek mt76 wireless hardware are required; corruption can crash the kernel or disclose kernel information.

The record

CVE
CVE-2020-12465
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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