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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-3492 Detail

Description

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html Third Party Advisory  VDB Entry 
http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html Third Party Advisory  VDB Entry 
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333 Mailing List  Patch  Vendor Advisory 
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333 Mailing List  Patch  Vendor Advisory 
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6 Mailing List  Patch  Vendor Advisory 
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6 Mailing List  Patch  Vendor Advisory 
https://ubuntu.com/security/notices/USN-4917-1 Vendor Advisory 
https://ubuntu.com/security/notices/USN-4917-1 Vendor Advisory 
https://www.openwall.com/lists/oss-security/2021/04/16/2 Mailing List  Third Party Advisory 
https://www.openwall.com/lists/oss-security/2021/04/16/2 Mailing List  Third Party Advisory 
https://www.zerodayinitiative.com/advisories/ZDI-21-422/ Third Party Advisory  VDB Entry 
https://www.zerodayinitiative.com/advisories/ZDI-21-422/ Third Party Advisory  VDB Entry 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-401 Missing Release of Memory after Effective Lifetime cwe source acceptance level NIST   Canonical Ltd.  
CWE-415 Double Free cwe source acceptance level NIST   Canonical Ltd.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-3492
NVD Published Date:
04/17/2021
NVD Last Modified:
11/21/2024
Source:
Canonical Ltd.