Vulnerability Details : CVE-2014-7843
The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.
Vulnerability category: Denial of service
Products affected by CVE-2014-7843
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:arm64:*
Exploit prediction scoring system (EPSS) score for CVE-2014-7843
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2014-7843
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST |
CWE ids for CVE-2014-7843
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2014-7843
-
http://www.openwall.com/lists/oss-security/2014/11/13/5
oss-security - CVE-2014-7843 Linux kernel: aarch64: copying from /dev/zero causes local DoS
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http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19d
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https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d
arm64: __clear_user: handle exceptions on strb · torvalds/linux@97fc154 · GitHubPatch;Vendor Advisory
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http://www.securityfocus.com/bid/71082
Linux Kernel CVE-2014-7843 Local Denial of Service Vulnerability
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https://bugzilla.redhat.com/show_bug.cgi?id=1163744
1163744 – (CVE-2014-7843) CVE-2014-7843 kernel: aarch64: copying from /dev/zero causes local DoSPatch;Vendor Advisory
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http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4
Vendor Advisory
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