vulnerability
Ubuntu: (Multiple Advisories) (CVE-2018-18397): Linux kernel vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:L/Au:N/C:N/I:P/A:N) | Dec 12, 2018 | Mar 13, 2019 | Aug 18, 2025 |
Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:N)
Published
Dec 12, 2018
Added
Mar 13, 2019
Modified
Aug 18, 2025
Description
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
Solutions
ubuntu-upgrade-linux-image-4-15-0-1009-oracleubuntu-upgrade-linux-image-4-15-0-1028-gcpubuntu-upgrade-linux-image-4-15-0-1030-kvmubuntu-upgrade-linux-image-4-15-0-1032-raspi2ubuntu-upgrade-linux-image-4-15-0-1033-awsubuntu-upgrade-linux-image-4-15-0-1034-oemubuntu-upgrade-linux-image-4-15-0-1040-azureubuntu-upgrade-linux-image-4-15-0-46-genericubuntu-upgrade-linux-image-4-15-0-46-generic-lpaeubuntu-upgrade-linux-image-4-15-0-46-lowlatencyubuntu-upgrade-linux-image-4-15-0-46-snapdragonubuntu-upgrade-linux-image-4-18-0-1007-gcpubuntu-upgrade-linux-image-4-18-0-1008-kvmubuntu-upgrade-linux-image-4-18-0-1010-raspi2ubuntu-upgrade-linux-image-4-18-0-1013-azureubuntu-upgrade-linux-image-4-18-0-16-genericubuntu-upgrade-linux-image-4-18-0-16-generic-lpaeubuntu-upgrade-linux-image-4-18-0-16-lowlatencyubuntu-upgrade-linux-image-4-18-0-16-snapdragonubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-hweubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-hwe-16-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-hwe-16-04ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04ubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-hwe-16-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragonubuntu-upgrade-linux-image-snapdragon-hwe-18-04
References
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