CVE-2014-7843

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-11-30 · updated 2026-06-17
Weakness: CWE-17

Description

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.

Affected products

Linux kernel: through 3.17.3

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19d
http://secunia.com/advisories/62305
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4
http://www.openwall.com/lists/oss-security/2014/11/13/5
http://www.securityfocus.com/bid/71082
https://bugzilla.redhat.com/show_bug.cgi?id=1163744
https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19d
http://secunia.com/advisories/62305
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4
http://www.openwall.com/lists/oss-security/2014/11/13/5
http://www.securityfocus.com/bid/71082

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