Linux Kernel up to 4.7 fs/ioctl.c ioctl_file_dedupe_range memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.4 | $5k-$25k | 0.00 |
A vulnerability was found in Linux Kernel up to 4.7 (Operating System). It has been classified as critical. Affected is the function ioctl_file_dedupe_range
of the file fs/ioctl.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
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.
The weakness was disclosed 08/06/2016 (Website). The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2016-6516 since 08/01/2016. The attack needs to be approached locally. The successful exploitation needs a authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/13/2022).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.4VulDB Meta Temp Score: 7.4
VulDB Base Score: 7.4
VulDB Temp Score: 7.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.4
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Memory corruptionCWE: CWE-119
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔍
Patch: git.kernel.org
Timeline
07/31/2016 🔍08/01/2016 🔍
08/06/2016 🔍
08/06/2016 🔍
08/08/2016 🔍
09/13/2022 🔍
Sources
Vendor: kernel.orgAdvisory: 10eec60ce79187686e052092e5383c99b4420a20
Status: Not defined
Confirmation: 🔍
CVE: CVE-2016-6516 (🔍)
SecurityFocus: 92259 - Linux Kernel CVE-2016-6516 Local Heap Overflow Vulnerability
Entry
Created: 08/08/2016 15:29Updated: 09/13/2022 12:26
Changes: 08/08/2016 15:29 (50), 03/22/2019 11:35 (13), 09/13/2022 12:26 (3)
Complete: 🔍
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