---
id: CVE-2026-98912
title: 'ALSA: seq: oss: Reject reads that cannot fit the next event'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: seq: oss: Reject reads that cannot fit the next event

  snd_seq_oss_read() checks whether the next queued OSS sequencer event
  fits in the remaining userspace buffe…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    b3b4b647313757a275be7f7f9d0415d0a90acf73
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    591226398c1f93bd994678237ff0be229b19d3bb
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    372bec8a01e2ab8eaa6851bdc346ede5f82dba99
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    2922cf2583e590f51bed613a6fcd27b9aea83674
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    7483fd5f6990f43cc266e94b3f50ce84856ebb97
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    20b8520d1ef996173065f7abdde47b99136c0785
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    611f538253d970f4d152003841544e875828d015
  - Linux < 5.10.271
  - Linux < 5.15.222
  - Linux < 6.1.189
  - Linux < 6.6.158
  - Linux < 6.12.111
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T11:55:04.908Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98912'
references:
  - url: 'https://git.kernel.org/stable/c/b3b4b647313757a275be7f7f9d0415d0a90acf73'
  - url: 'https://git.kernel.org/stable/c/591226398c1f93bd994678237ff0be229b19d3bb'
  - url: 'https://git.kernel.org/stable/c/372bec8a01e2ab8eaa6851bdc346ede5f82dba99'
  - url: 'https://git.kernel.org/stable/c/2922cf2583e590f51bed613a6fcd27b9aea83674'
  - url: 'https://git.kernel.org/stable/c/7483fd5f6990f43cc266e94b3f50ce84856ebb97'
  - url: 'https://git.kernel.org/stable/c/20b8520d1ef996173065f7abdde47b99136c0785'
  - url: 'https://git.kernel.org/stable/c/611f538253d970f4d152003841544e875828d015'
tags:
  - cve.org
ingestedAt: '2026-10-23T13:24:55.571Z'
---

## Overview

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

ALSA: seq: oss: Reject reads that cannot fit the next event

snd_seq_oss_read() checks whether the next queued OSS sequencer event
fits in the remaining userspace buffer before removing it from the read
queue.

The check is inverted. It currently stops when the event is smaller than
the remaining buffer, so a normal 4-byte event is not copied for an
8-byte read buffer. Conversely, an 8-byte event can be copied for a
smaller read count.

Break only when the remaining userspace buffer is smaller than the next
event, and report -EINVAL if no complete event has been copied. This
prevents an undersized read from looking like end-of-file while leaving
the event queued for a later read with a large enough buffer.

## Affected

- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b3b4b647313757a275be7f7f9d0415d0a90acf73`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 591226398c1f93bd994678237ff0be229b19d3bb`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 372bec8a01e2ab8eaa6851bdc346ede5f82dba99`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2922cf2583e590f51bed613a6fcd27b9aea83674`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7483fd5f6990f43cc266e94b3f50ce84856ebb97`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 20b8520d1ef996173065f7abdde47b99136c0785`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 611f538253d970f4d152003841544e875828d015`
- `Linux < 5.10.271`
- `Linux < 5.15.222`
- `Linux < 6.1.189`
- `Linux < 6.6.158`
- `Linux < 6.12.111`
- `Linux < 6.18.53`
- `Linux (all versions)`

## Remediation

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