---
id: CVE-2026-22984
title: 'libceph: prevent potential out-of-bounds reads in handle_auth_done()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  libceph: prevent potential out-of-bounds reads in handle_auth_done()

  Perform an explicit bounds check on payload_len to avoid a possible
  out-of-bounds access in the ca…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 <
    194cfe2af4d2a1de599d39dad636b47c2f6c2c96
  - >-
    Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 <
    79fe3511db416d2f2edcfd93569807cb02736e5e
  - >-
    Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 <
    ef208ea331ef688729f64089b895ed1b49e842e3
  - >-
    Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 <
    2802ef3380fa8c4a08cda51ec1f085b1a712e9e2
  - >-
    Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 <
    2d653bb63d598ae4b096dd678744bdcc34ee89e8
  - >-
    Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 <
    818156caffbf55cb4d368f9c3cac64e458fb49c9
  - Linux 5.11
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-06-16T20:34:59.073775Z'
published: '2026-01-23'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T18:25:26.154Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-22984'
references:
  - url: 'https://git.kernel.org/stable/c/194cfe2af4d2a1de599d39dad636b47c2f6c2c96'
  - url: 'https://git.kernel.org/stable/c/79fe3511db416d2f2edcfd93569807cb02736e5e'
  - url: 'https://git.kernel.org/stable/c/ef208ea331ef688729f64089b895ed1b49e842e3'
  - url: 'https://git.kernel.org/stable/c/2802ef3380fa8c4a08cda51ec1f085b1a712e9e2'
  - url: 'https://git.kernel.org/stable/c/2d653bb63d598ae4b096dd678744bdcc34ee89e8'
  - url: 'https://git.kernel.org/stable/c/818156caffbf55cb4d368f9c3cac64e458fb49c9'
tags:
  - cve.org
epss: 0.00385
epssPercentile: 0.31056
ingestedAt: '2026-10-19T18:35:50.121Z'
---

## Overview

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

libceph: prevent potential out-of-bounds reads in handle_auth_done()

Perform an explicit bounds check on payload_len to avoid a possible
out-of-bounds access in the callout.

[ idryomov: changelog ]

## Affected

- `Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 194cfe2af4d2a1de599d39dad636b47c2f6c2c96`
- `Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 79fe3511db416d2f2edcfd93569807cb02736e5e`
- `Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < ef208ea331ef688729f64089b895ed1b49e842e3`
- `Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 2802ef3380fa8c4a08cda51ec1f085b1a712e9e2`
- `Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 2d653bb63d598ae4b096dd678744bdcc34ee89e8`
- `Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 818156caffbf55cb4d368f9c3cac64e458fb49c9`
- `Linux 5.11`

## Remediation

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