CVE-2026-98114 ksmbd: propagate DACL parsing errors
A flaw in the Linux kernel's ksmbd module allows attackers to bypass ACL checks by sending malformed security descriptors, potentially leading to unauthorized file access or modification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98114?
CVE-2026-98114 is a medium-severity missing authorization vulnerability in Linux kernel, published on 25 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: propagate DACL parsing errors
parse_dacl() silently accepts truncated ACEs and allocation failures, allowing set_info_sec() to continue with an incomplete ACL conversion.
Return parsing and allocation errors to parse_sec_desc() so malformed security descriptors are rejected before inode attributes or ACL xattrs are updated.
Weakness: CWE-252
Which versions are affected by CVE-2026-98114?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-98114?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-98114 being exploited?
There is no known exploitation of CVE-2026-98114 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-104481, BELL-CVE-2026-98114, DEBIAN-CVE-2026-98114, GHSA-fpg3-37rc-jhfw, UBUNTU-CVE-2026-98114.