Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.17.1 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50PatchThird Party Advisory
- http://www.securityfocus.com/bid/104453Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2948
- https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e1PatchThird Party Advisory
- https://lkml.org/lkml/2018/6/5/14Third Party Advisory
- https://patchwork.ozlabs.org/patch/926519/PatchThird Party Advisory
- https://usn.ubuntu.com/3752-1/
- https://usn.ubuntu.com/3752-2/
- https://usn.ubuntu.com/3752-3/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50PatchThird Party Advisory
- http://www.securityfocus.com/bid/104453Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2948
- https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e1PatchThird Party Advisory
- https://lkml.org/lkml/2018/6/5/14Third Party Advisory
- https://patchwork.ozlabs.org/patch/926519/PatchThird Party Advisory
FAQ
What is CVE-2018-12232?
CVE-2018-12232 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 sockf...
How severe is CVE-2018-12232?
CVE-2018-12232 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-12232?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.