---
id: CVE-2026-90434
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  isofs: release zisofs block pointer buffer head

  zisofs_fill_pages() reads the compressed block pointer table
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  isofs: release zisofs block pointer buffer head

  zisofs_fill_pages() reads the compressed block pointer table.  The error
  paths release the current buffer_head, the loo…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    dbcc7d1b818162aeab2e97fd217d86546d9fde15
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    ec33e6b7a1de20d7e623b12633191a855445657d
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    0c2c54a7d174edc845f7bae24179fe72a926d10f
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    5677737c2cedf417c0fcf61540b9cef0e62273d4
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    f2a1611065c700a374b31c5cc8a7587f5e3bfe73
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    106e1a3b2b3454fbda63a59e9290cb9a253f81aa
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    3371d30a97a257b7b5f2c8009612e9d452180f0a
  - >-
    Linux >= 59bc055211b8d266ab6089158058bf8268e02006 <
    2f7dd9b86fe4076059e6a4a2a2c5d565afd76b9e
  - Linux 2.6.33
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:48.597'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90434'
references:
  - url: 'https://git.kernel.org/stable/c/0c2c54a7d174edc845f7bae24179fe72a926d10f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/106e1a3b2b3454fbda63a59e9290cb9a253f81aa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2f7dd9b86fe4076059e6a4a2a2c5d565afd76b9e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3371d30a97a257b7b5f2c8009612e9d452180f0a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5677737c2cedf417c0fcf61540b9cef0e62273d4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dbcc7d1b818162aeab2e97fd217d86546d9fde15'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ec33e6b7a1de20d7e623b12633191a855445657d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f2a1611065c700a374b31c5cc8a7587f5e3bfe73'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.790Z'
epss: 0.0021
epssPercentile: 0.11567
---

## Overview

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

isofs: release zisofs block pointer buffer head

zisofs_fill_pages() reads the compressed block pointer table.  The error
paths release the current buffer_head, the loop also releases the old
buffer_head when it advances. However, the success path leaves the last
buffer_head referenced. Release it before returning success.

## Remediation

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