Published: 12/06/2018 Updated: 31/10/2018

CVSS v2 Base Score: 7.1 | Impact Score: 6.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 5.9 | Impact Score: 3.6 | Exploitability Score: 2.2

VMScore: 632

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

In net/socket.c in the Linux kernel up to and including 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.

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linux linux kernel

Synopsis Important: kernel-alt security, bug fix, and enhancement update Type/Severity Security Advisory: Important Topic An update for kernel-alt is now available for Red Hat Enterprise Linux 7Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability S ...

Several security issues were fixed in the Linux kernel ...

A NULL pointer dereference issue was found in the Linux kernel If the close() and fchownat() system calls share a socket file descriptor as an argument, then the two calls can race and trigger a NULL pointer dereference leading to a system crash and a denial of service(CVE-2018-12232) ...

A NULL pointer dereference issue was found in the Linux kernel If the close() and fchownat() system calls share a socket file descriptor as an argument, then the two calls can race and trigger a NULL pointer dereference leading to a system crash and a denial of service ...

MoonShine: Seed Selection for OS Fuzzers (USENIX '18) MoonShine selects compact and diverse seeds for OS fuzzers from system call traces of real world programs Please see our USENIX'18 paper MoonShine: Optimizing OS Fuzzer Seed Selection with Trace Distillation for more details Currently, MoonShine can only generate seeds for Syzkaller on Linux Contents Getting St

CWE-362 https://patchwork.ozlabs.org/patch/926519/https://lkml.org/lkml/2018/6/5/14 https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14 http://www.securityfocus.com/bid/104453 https://usn.ubuntu.com/3752-2/https://usn.ubuntu.com/3752-1/https://usn.ubuntu.com/3752-3/https://access.redhat.com/errata/RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948 https://nvd.nist.gov https://usn.ubuntu.com/3752-1/

CVE-2018-12232

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