CVE-2018-16862

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-11-26 · updated 2026-06-17
Weakness: CWE-200

Description

A security flaw was found in the Linux kernel in a way that the cleancache subsystem clears an inode after the final file truncation (removal). The new file created with the same inode may contain leftover pages from cleancache and the old file data instead of the new one.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04
Debian Linux: 8.0
Linux kernel: through 4.14
Red Hat Enterprise Linux: 7.0

References

http://www.securityfocus.com/bid/106009
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16862
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
https://lore.kernel.org/patchwork/patch/1011367/
https://seclists.org/oss-sec/2018/q4/169
https://usn.ubuntu.com/3879-1/
https://usn.ubuntu.com/3879-2/
https://usn.ubuntu.com/4094-1/
https://usn.ubuntu.com/4118-1/
http://www.securityfocus.com/bid/106009

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