---
id: CVE-2026-97605
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  erofs: preserve LZMA decoders on resize failure

  The pool-resize path frees each stream's old decoder before allocating
  its replacement
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  erofs: preserve LZMA decoders on resize failure

  The pool-resize path frees each stream's old decoder before allocating
  its replacement. If an allocation fails after so…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa <
    604ce546e1b9f35b1f45588004f53fac6b2869c1
  - >-
    Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa <
    0b3c8c39e50249470f00a5f73c288b95a55ab576
  - >-
    Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa <
    38e9e07ac02a9453a117410776f1502a9980997e
  - >-
    Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa <
    617d0d8d199ba1790c94310fd75a22d01c97a8d6
  - Linux 5.16
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:14.543'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97605'
references:
  - url: 'https://git.kernel.org/stable/c/0b3c8c39e50249470f00a5f73c288b95a55ab576'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/38e9e07ac02a9453a117410776f1502a9980997e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/604ce546e1b9f35b1f45588004f53fac6b2869c1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/617d0d8d199ba1790c94310fd75a22d01c97a8d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.901Z'
epss: 0.002
epssPercentile: 0.08833
---

## Overview

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

erofs: preserve LZMA decoders on resize failure

The pool-resize path frees each stream's old decoder before allocating
its replacement. If an allocation fails after some streams have already
been replaced, the failed stream is put back on the list with state ==
NULL. z_erofs_lzma_max_dictsize is still advanced as if the whole
pool had been resized.

An existing LZMA mount can select the broken stream and pass
NULL to xz_dec_microlzma_reset(). A retry at the same size also
skip another resize attempt. Since the global maximum was advanced,
thus, the invalid state is left unrepaired.

Allocate each replacement before freeing the old decoder, temporarily
retaining one old decoder during allocation. Stop at the first failure
and advance z_erofs_lzma_max_dictsize only after all streams satisfy
the request.

Record each stream's dictionary capacity so retries can skip streams
already enlarged before a partial failure.

## Remediation

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