Vulnerability Name:

CVE-2015-8839

Assigned:2016-04-01
Published:2016-03-31
Updated:2018-01-04
Summary:Multiple race conditions in the ext4 filesystem implementation in the Linux kernel before 4.5 allow local users to cause a denial of service (disk corruption) by writing to a page that is associated with a different user's file after unsynchronized hole punching and page-fault handling.
CVSS v3 Severity:5.1 Medium (CVSS v3 Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
4.5 Medium (Temporal CVSS v3 Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.2 Medium (CCN CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.4 Medium (CCN Temporal CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:1.9 Low (CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
4.7 Medium (REDHAT CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-362
References:Source: CONFIRM
Type: VENDOR_ADVISORY
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea3d7209ca01da209cda6f0dea8be9cc4b7a933b

Source: MLIST
Type: UNKNOWN
[oss-security] 20160401 Re: ext4 data corruption due to punch hole races

Source: BID
Type: UNKNOWN
85798

Source: SECTRACK
Type: UNKNOWN
1035455

Source: UBUNTU
Type: UNKNOWN
USN-3005-1

Source: UBUNTU
Type: UNKNOWN
USN-3006-1

Source: UBUNTU
Type: UNKNOWN
USN-3007-1

Source: REDHAT
Type: UNKNOWN
RHSA-2017:1842

Source: REDHAT
Type: UNKNOWN
RHSA-2017:2077

Source: REDHAT
Type: UNKNOWN
RHSA-2017:2669

Source: CONFIRM
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=1323577

Source: XF
Type: UNKNOWN
linux-kernel-cve20158839-dos(114520)

Source: CONFIRM
Type: VENDOR_ADVISORY
https://github.com/torvalds/linux/commit/ea3d7209ca01da209cda6f0dea8be9cc4b7a933b

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:4.5.0:rc7:*:*:*:*:*:*

  • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:14.04::~~lts~~~:*:*:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:16.04::~~lts~~~:*:*:*:*:*

  • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

  • Configuration RedHat 2:
  • cpe:/a:redhat:rhel_extras_rt:7:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/a:accelatech:bizsearch:3.2:-:*:*:*:linux_kernel:*:*

  • Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20171842
    P
    RHSA-2017:1842: kernel security, bug fix, and enhancement update (Important)
    2017-08-01
    oval:com.redhat.rhsa:def:20172077
    P
    RHSA-2017:2077: kernel-rt security, bug fix, and enhancement update (Important)
    2017-08-01
    oval:com.ubuntu.xenial:def:20158839000
    V
    CVE-2015-8839 on Ubuntu 16.04 LTS (xenial) - medium.
    2016-05-02
    oval:com.ubuntu.precise:def:20158839000
    V
    CVE-2015-8839 on Ubuntu 12.04 LTS (precise) - medium.
    2016-05-02
    oval:com.ubuntu.trusty:def:20158839000
    V
    CVE-2015-8839 on Ubuntu 14.04 LTS (trusty) - medium.
    2016-05-02
    BACK
    linux linux_kernel 4.5.0 rc7
    canonical ubuntu_linux 14.04
    canonical ubuntu_linux 16.04
    redhat enterprise_linux 7
    redhat rhel_extras_rt 7