vulnerability
Ubuntu: (Multiple Advisories) (CVE-2018-12232): Linux kernel vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:N/I:N/A:C) | Jun 12, 2018 | Aug 31, 2018 | Aug 18, 2025 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
Jun 12, 2018
Added
Aug 31, 2018
Modified
Aug 18, 2025
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.
Solutions
ubuntu-upgrade-linux-image-4-15-0-1017-oemubuntu-upgrade-linux-image-4-15-0-1018-gcpubuntu-upgrade-linux-image-4-15-0-1020-awsubuntu-upgrade-linux-image-4-15-0-1020-kvmubuntu-upgrade-linux-image-4-15-0-1021-raspi2ubuntu-upgrade-linux-image-4-15-0-1022-azureubuntu-upgrade-linux-image-4-15-0-33-genericubuntu-upgrade-linux-image-4-15-0-33-generic-lpaeubuntu-upgrade-linux-image-4-15-0-33-lowlatencyubuntu-upgrade-linux-image-4-15-0-33-snapdragonubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-edgeubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-hwe-16-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-hwe-16-04ubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-hwe-16-04ubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragon
References
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