Linux Kernel up to 5.6.6 net/xdp/xdp_umem.c xdp_umem_reg out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.6.6. It has been declared as critical. Affected by this vulnerability is the function xdp_umem_reg of the file net/xdp/xdp_umem.c. Such manipulation leads to out-of-bounds write. This vulnerability is listed as CVE-2020-12659. The attack must be carried out locally. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.6.6 (Operating System). Affected by this issue is the function xdp_umem_reg of the file net/xdp/xdp_umem.c. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in the Linux kernel before 5.6.7. xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write (by a user with the CAP_NET_ADMIN capability) because of a lack of headroom validation.

The weakness was presented 05/05/2020. This vulnerability is handled as CVE-2020-12659 since 05/05/2020. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 247095 (Linux Distros Unpatched Vulnerability : CVE-2020-12659), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.6.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (247095). See VDB-154747, VDB-154746, VDB-154745 and VDB-154744 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 247095
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-12659

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.6.7

Timelineinfo

05/05/2020 🔍
05/05/2020 +0 days 🔍
05/05/2020 +0 days 🔍
08/09/2025 +1922 days 🔍

Sourcesinfo

Vendor: kernel.org

Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-12659 (🔍)
GCVE (CVE): GCVE-0-2020-12659
GCVE (VulDB): GCVE-100-154748
See also: 🔍

Entryinfo

Created: 05/05/2020 20:36
Updated: 08/09/2025 20:29
Changes: 05/05/2020 20:36 (40), 05/05/2020 20:41 (18), 10/15/2020 11:33 (1), 08/09/2025 20:29 (20)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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