Linux Kernel up to 5.10.11 PI Futex use after free

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8.0$5k-$25k0.43

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 memory corruption vulnerability. The CWE definition for the vulnerability is CWE-416. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.

The weakness was disclosed 01/30/2021. The advisory is available at openwall.com. This vulnerability was named CVE-2021-3347 since 01/29/2021. The exploitation appears to be easy. The attack can be initiated remotely. The requirement for exploitation is a single authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 02/21/2021).

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

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VulDB Meta Base Score: 8.3
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: 🔒

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VulDB Base Score: 🔒
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VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Memory corruption
CWE: CWE-416
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: git.kernel.org

Timelineinfoedit

01/29/2021 CVE assigned
01/30/2021 +1 days Advisory disclosed
01/30/2021 +0 days VulDB entry created
02/21/2021 +22 days VulDB last update

Sourcesinfoedit

Vendor: https://www.kernel.org/

Advisory: openwall.com
Status: Confirmed

CVE: CVE-2021-3347 (🔒)

Entryinfoedit

Created: 01/30/2021 10:57 AM
Updated: 02/21/2021 06:24 PM
Changes: (18) vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss2_nvd_basescore vulnerability_cvss3_nvd_basescore
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