CVE-2015-8839

LOW

Description

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.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea3d7209ca01da209cda6f0dea8be9cc4b7a933b

http://www.openwall.com/lists/oss-security/2016/04/01/4

http://www.securityfocus.com/bid/85798

http://www.securitytracker.com/id/1035455

http://www.ubuntu.com/usn/USN-3005-1

http://www.ubuntu.com/usn/USN-3006-1

http://www.ubuntu.com/usn/USN-3007-1

https://access.redhat.com/errata/RHSA-2017:1842

https://access.redhat.com/errata/RHSA-2017:2077

https://access.redhat.com/errata/RHSA-2017:2669

https://bugzilla.redhat.com/show_bug.cgi?id=1323577

https://github.com/torvalds/linux/commit/ea3d7209ca01da209cda6f0dea8be9cc4b7a933b

https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html

https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html

Details

Source: MITRE

Published: 2016-05-02

Updated: 2020-10-02

Type: CWE-362

Risk Information

CVSS v2.0

Base Score: 1.9

Vector: AV:L/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3.0

Base Score: 5.1

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.4

Severity: MEDIUM