CVE-2016-6516
Race condition in the ioctl_file_dedupe_range function in fs/ioctl.c in the Linux kernel through...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2016-6516- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.4 Medium
AV:L/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-119, CWE-362
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2016-6516- Updated
- 2026-11-02
EUVDEUVD-2016-7438 No score
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.
- Record
EUVD-2016-7438- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j5cv-c6j4-5gv8
Race condition in the ioctl_file_dedupe_range function in fs/ioctl.c in the Linux kernel through...
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.
- Record
GHSA-j5cv-c6j4-5gv8- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2016-6516- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2016-6516
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.
- Record
DEBIAN-CVE-2016-6516- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2016-6516
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.
- Record
UBUNTU-CVE-2016-6516- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10128-1 No score
kernel-debug-4.8.13-1.1 on GA media
These are all security issues fixed in the kernel-debug-4.8.13-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10128-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linuxDebian:12 |
before 4.7.2-1 | 4.7.2-1 |
linuxDebian:13 |
before 4.7.2-1 | 4.7.2-1 |
linuxDebian:14 |
before 4.7.2-1 | 4.7.2-1 |
kernel-sourceopenSUSE:Tumbleweed From an advisory covering 82 CVEs |
before 4.8.13-1.1 | 4.8.13-1.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | wpengfei/CVE-2016-6516-exploit | 2017-12-07 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-6516 is a high vulnerability (CVSS 7.4) in Linux Kernel, published August 6, 2016. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.95%, the 61st percentile. Fixed in linux 4.7.2-1.
References
github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20
securityfocus.com/bid/92259
openwall.com/lists/oss-security/2016/07/31/6
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=10eec60ce79187686e052092e5383c99b4420a20
bugzilla.redhat.com/show_bug.cgi?id=1362457
nvd.nist.gov/vuln/detail/CVE-2016-6516
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security-tracker.debian.org/tracker/CVE-2016-6516
ubuntu.com/security/CVE-2016-6516
cve.org/CVERecord?id=CVE-2016-6516
suse.com/security/cve/CVE-2009-3939