Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| n/a / n/a | affected n/a |
CWE
No CWE identifiers supplied.
References
- 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=6d8c50dcb029872b298eea68cc6209c866fd3e14
- https://patchwork.ozlabs.org/patch/926519/
- https://access.redhat.com/errata/RHSA-2018:2948
- https://lkml.org/lkml/2018/6/5/14
- http://www.securityfocus.com/bid/104453
- https://usn.ubuntu.com/3752-1/
- https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14
ADP enrichment
No English description supplied.
- 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=6d8c50dcb029872b298eea68cc6209c866fd3e14
- https://patchwork.ozlabs.org/patch/926519/
- https://access.redhat.com/errata/RHSA-2018:2948
- https://lkml.org/lkml/2018/6/5/14
- http://www.securityfocus.com/bid/104453
- https://usn.ubuntu.com/3752-1/
- https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14