Linux Kernel up to 5.6.2 mm/mempolicy.c mpol_parse_str out-of-bounds write ⚔ [Disputed]

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 5.6.2. This impacts the function mpol_parse_str of the file mm/mempolicy.c. The manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2020-11565. Local access is required to approach this attack. No exploit exists. The existence of this vulnerability is still disputed at present.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.6.2 (Operating System). This issue affects the function mpol_parse_str of the file mm/mempolicy.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. The summary by CVE is:

An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bounds write because an empty nodelist is mishandled during mount option parsing, aka CID-aa9f7d5172fa.

The weakness was disclosed 04/06/2020. The identification of this vulnerability is CVE-2020-11565 since 04/06/2020. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/04/2024).

The real existence of this vulnerability is still doubted at the moment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.6

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

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

04/06/2020 🔍
04/06/2020 +0 days 🔍
04/06/2020 +0 days 🔍
08/04/2024 +1581 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd
Status: Not defined
Disputed: 🔍

CVE: CVE-2020-11565 (🔍)
GCVE (CVE): GCVE-0-2020-11565
GCVE (VulDB): GCVE-100-152777

Entryinfo

Created: 04/06/2020 07:49
Updated: 08/04/2024 14:22
Changes: 04/06/2020 07:49 (37), 04/06/2020 07:54 (18), 05/17/2024 07:44 (19), 05/17/2024 07:50 (1), 06/27/2024 01:16 (8), 08/04/2024 14:22 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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