CVE-2026-98988
kernel: namespace: keep covered mounts covered in OPEN_TREE_NAMESPACE
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 30, 2026
Description
A flaw was found in the Linux kernel. When creating a new mount namespace using the open_tree() system call, child and covered mounts are not properly preserved during namespace copying. A local attacker can exploit this vulnerability to reveal and access sensitive filesystem paths intentionally masked or hidden by container runtimes, leading to unauthorized information disclosure.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE-552 · Files or Directories Accessible to External Parties