Race condition in Linux kernel - CVE-2015-7312
Published: November 16, 2015 / Updated: August 7, 2020
Vulnerability identifier: #VU95720
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-7312
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to read and manipulate data.
Multiple race conditions in the Advanced Union Filesystem (aufs) aufs3-mmap.patch and aufs4-mmap.patch patches for the Linux kernel 3.x and 4.x allow local users to cause a denial of service (use-after-free and BUG) or possibly gain privileges via a (1) madvise or (2) msync system call, related to mm/madvise.c and mm/msync.c.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-trusty (Ubuntu package)
linux-lts-vivid (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-lts-trusty (Ubuntu package)
linux-lts-vivid (Ubuntu package)
How to mitigate CVE-2015-7312
Install update from vendor's repository.
linux (Ubuntu package) - addressed in versions 3.13.0-66.108, 3.19.0-31.36
linux-lts-trusty (Ubuntu package) - update to 3.13.0-66.108~precise1
linux-lts-vivid (Ubuntu package) - update to 3.19.0-31.36~14.04.1
linux-lts-trusty (Ubuntu package) - update to 3.13.0-66.108~precise1
linux-lts-vivid (Ubuntu package) - update to 3.19.0-31.36~14.04.1