---
id: CVE-2026-98113
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: rate limit unmapped SID errors

  A client can include many structurally valid but unmapped SIDs in a DACL.
  Logging every mapping failure lets one request generate…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: rate limit unmapped SID errors

  A client can include many structurally valid but unmapped SIDs in a DACL.
  Logging every mapping failure lets one request generate…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <
    3005d43143096321cc857645a9d48ef4ffde8bcf
  - >-
    Linux >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <
    674aabf554bdaffcf25f145bf32c8b4f510f7916
  - >-
    Linux >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <
    486876f957456721b5e51af532235db4c6f7bd47
  - >-
    Linux >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <
    13af319c1efec0b45fb5c1b16830eb0888b3fd1e
  - >-
    Linux >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <
    30dbb08777b9a611d7d9193c040f382fbd0e7562
  - >-
    Linux >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <
    54cb2a909996346ac6a8a3beac96c07b3dcba584
  - >-
    Linux >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <
    feca5e70fc963b088377b20879e8cd8237c2fd7d
  - Linux 5.15
published: '2026-09-25'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:18:33.347'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98113'
references:
  - url: 'https://git.kernel.org/stable/c/13af319c1efec0b45fb5c1b16830eb0888b3fd1e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3005d43143096321cc857645a9d48ef4ffde8bcf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/30dbb08777b9a611d7d9193c040f382fbd0e7562'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/486876f957456721b5e51af532235db4c6f7bd47'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/54cb2a909996346ac6a8a3beac96c07b3dcba584'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/674aabf554bdaffcf25f145bf32c8b4f510f7916'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/feca5e70fc963b088377b20879e8cd8237c2fd7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98113.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98113'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541363'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98113'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98113'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98113.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00205
epssPercentile: 0.10457
cvssSource: vendor
ingestedAt: '2026-09-25T11:06:38.824Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: rate limit unmapped SID errors

A client can include many structurally valid but unmapped SIDs in a DACL.
Logging every mapping failure lets one request generate hundreds of kernel
error messages.

Rate limit the message to prevent an authenticated client from flooding
the kernel log.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98113.json)