CVE-2018-12232
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…
Does this matter?
Lower severity and a low EPSS score (6.53%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 6.53% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
- http://www.securityfocus.com/bid/104453Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2948
- https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
- https://lkml.org/lkml/2018/6/5/14Third Party Advisory
- https://patchwork.ozlabs.org/patch/926519/Patch, Third 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=6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
- http://www.securityfocus.com/bid/104453Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2948
- https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
- https://lkml.org/lkml/2018/6/5/14Third Party Advisory
- https://patchwork.ozlabs.org/patch/926519/Patch, Third Party Advisory
- https://usn.ubuntu.com/3752-1/
- https://usn.ubuntu.com/3752-2/
- https://usn.ubuntu.com/3752-3/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.