CVE-2026-98113
kernel: ksmbd: rate limit unmapped SID errors
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's ksmbd server. An authenticated remote client can cause a Denial of Service (DoS) by sending requests containing multiple unmapped Security Identifiers (SIDs) within a Discretionary Access Control List (DACL). Because the server logs each mapping failure without rate limiting, a single request can generate hundreds of error messages. This allows an attacker to flood the kernel log, potentially exhausting storage or degrading system performance.
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:N/I:N/A:H
CWE-770 · Allocation of Resources Without Limits or Throttling