What’s Vulnerable › Vulnerabilities

CVE-2016-6516

• Severity: high (CVSS 7.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-08-06 · updated 2026-06-17
• Weakness: CWE-119

Description

Race condition in the ioctl_file_dedupe_range function in fs/ioctl.c in the Linux kernel through 4.7 allows local users to cause a denial of service (heap-based buffer overflow) or possibly gain privileges by changing a certain count value, aka a "double fetch" vulnerability.

Affected products

• Linux kernel: through 4.7

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20
• http://www.openwall.com/lists/oss-security/2016/07/31/6
• http://www.securityfocus.com/bid/92259
• https://bugzilla.redhat.com/show_bug.cgi?id=1362457
• https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20
• http://www.openwall.com/lists/oss-security/2016/07/31/6
• http://www.securityfocus.com/bid/92259
• https://bugzilla.redhat.com/show_bug.cgi?id=1362457
• https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20

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