Linux Kernel up to 5.10.11 PI Futex use after free

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 5.10.11. The affected element is an unknown function of the component PI Futex Handler. Executing a manipulation can lead to use after free. This vulnerability is tracked as CVE-2021-3347. The attack can be launched remotely. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.10.11 (Operating System). This vulnerability affects an unknown code block of the component PI Futex Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 01/30/2021. The advisory is available at openwall.com. This vulnerability was named CVE-2021-3347. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 208607 (CentOS 7 : kpatch-patch (RHSA-2021:2285)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the vulnerability database at Tenable (208607). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

ADP CISA Base Score: 7.8
ADP CISA 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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 208607
Nessus Name: CentOS 7 : kpatch-patch (RHSA-2021:2285)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

01/29/2021 🔍
01/30/2021 +1 days 🔍
01/30/2021 +0 days 🔍
02/25/2026 +1852 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: openwall.com
Status: Confirmed

CVE: CVE-2021-3347 (🔍)
GCVE (CVE): GCVE-0-2021-3347
GCVE (VulDB): GCVE-100-168922

Entryinfo

Created: 01/30/2021 10:57
Updated: 02/25/2026 20:45
Changes: 01/30/2021 10:57 (40), 02/21/2021 18:21 (5), 02/21/2021 18:24 (18), 10/13/2024 13:29 (17), 02/25/2026 20:45 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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