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In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.
Publish Date : 2018-06-12 Last Update Date : 2018-08-06
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CVSS Scores & Vulnerability Types
| CVSS Score |
7.1 |
| Confidentiality Impact |
None
(There is no impact to the confidentiality of the system.) |
| Integrity Impact |
None
(There is no impact to the integrity of the system) |
| Availability Impact |
Complete
(There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.) |
| Access Complexity |
Medium
(The access conditions are somewhat specialized. Some preconditions must be satistified to exploit) |
| Authentication |
Not required
(Authentication is not required to exploit the vulnerability.) |
| Gained Access |
None |
| Vulnerability Type(s) |
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| CWE ID |
362 |
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Products Affected By CVE-2018-12232
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Number Of Affected Versions By Product
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References For CVE-2018-12232
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Metasploit Modules Related To CVE-2018-12232
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