Vulnerability Details : CVE-2016-2547
sound/core/timer.c in the Linux kernel before 4.4.1 employs a locking approach that does not consider slave timer instances, which allows local users to cause a denial of service (race condition, use-after-free, and system crash) via a crafted ioctl call.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2016-2547
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-2547
0.18%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 55 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-2547
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.7
|
MEDIUM | AV:L/AC:M/Au:N/C:N/I:N/A:C |
3.4
|
6.9
|
NIST | |
|
5.1
|
MEDIUM | CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
1.4
|
3.6
|
NIST |
CWE ids for CVE-2016-2547
-
The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-2547
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http://www.ubuntu.com/usn/USN-2930-3
USN-2930-3: Linux kernel (Raspberry Pi 2) vulnerabilities | Ubuntu security notices
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http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
[security-announce] SUSE-SU-2016:0911-1: important: Security update for
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http://www.ubuntu.com/usn/USN-2930-2
USN-2930-2: Linux kernel (Wily HWE) vulnerabilities | Ubuntu security notices
-
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
[security-announce] SUSE-SU-2016:1102-1: important: Security update for
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http://www.securityfocus.com/bid/83378
Linux Kernel CVE-2016-2547 Multiple Local Denial of Service Vulnerabilities
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http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
[security-announce] SUSE-SU-2016:2074-1: important: Security update for
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b5a663aa426f4884c71cd8580adae73f33570f0d
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
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http://www.ubuntu.com/usn/USN-2932-1
USN-2932-1: Linux kernel (Vivid HWE) vulnerabilities | Ubuntu security notices
-
http://www.debian.org/security/2016/dsa-3503
Debian -- Security Information -- DSA-3503-1 linux
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http://www.ubuntu.com/usn/USN-2931-1
USN-2931-1: Linux kernel (Utopic HWE) vulnerabilities | Ubuntu security notices
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http://www.securitytracker.com/id/1035298
Linux Kernel Sound Driver snd_timer_close() Lets Local Users Cause Denial of Service Conditions on the Target System - SecurityTracker
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http://www.ubuntu.com/usn/USN-2967-2
USN-2967-2: Linux kernel (OMAP4) vulnerabilities | Ubuntu security notices
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http://www.ubuntu.com/usn/USN-2929-2
USN-2929-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices
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http://www.ubuntu.com/usn/USN-2929-1
USN-2929-1: Linux kernel vulnerabilities | Ubuntu security notices
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http://www.openwall.com/lists/oss-security/2016/01/19/1
oss-security - Security bugs in Linux kernel sound subsystemPatch
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http://www.ubuntu.com/usn/USN-2930-1
USN-2930-1: Linux kernel vulnerabilities | Ubuntu security notices
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https://github.com/torvalds/linux/commit/b5a663aa426f4884c71cd8580adae73f33570f0d
ALSA: timer: Harden slave timer list handling · torvalds/linux@b5a663a · GitHubPatch;Vendor Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=1311566
1311566 – (CVE-2016-2547) CVE-2016-2547 kernel: sound: use-after-free in snd_timer_user_ioctl
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http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1
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http://www.ubuntu.com/usn/USN-2967-1
USN-2967-1: Linux kernel vulnerabilities | Ubuntu security notices
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