SB2016050220 - Race condition in Linux kernel ext4

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Main Vulnerability Database SB2016050220

SB2016050220 - Race condition in Linux kernel ext4

Published: May 2, 2016

Security Bulletin ID SB2016050220
Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Race condition (CVE-ID: CVE-2015-8839)

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition within the init_once() function in fs/ext4/super.c, within the ext4_punch_hole(), ext4_setattr(), ext4_page_mkwrite() and block_page_mkwrite_return() functions in fs/ext4/inode.c, within the ext4_dax_fault() and ext4_dax_pmd_fault() functions in fs/ext4/file.c, within the ext4_zero_range(), ext4_collapse_range() and ext4_insert_range() functions in fs/ext4/extents.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References