---
id: CVE-2026-80737
title: 'serial: amba-pl011: synchronize DMA teardown'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  serial: amba-pl011: synchronize DMA teardown

  dmaengine_terminate_all() does not wait for a running callback, so the TX
  callback can still touch the TX buffer after it …
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    44bd0ecc3444882d08ecfbc2b2418d2f463d3186
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    c8c8e895f65fbf71ea6224e27cf8dab91b776e0d
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    9f6989e477f03a4721d34bb4b09b17accd40283e
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    5974cb66681eac367107b05924744d7e3b49d41c
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    fdfb46c387241b4eddd36d746793764413285913
  - >-
    Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd <
    440915499231e9db1c361aa45bb702e8fd3b4a32
  - Linux 2.6.39
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T19:21:17.321670Z'
published: '2026-09-03'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:26:36.178Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80737'
references:
  - url: 'https://git.kernel.org/stable/c/a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e'
  - url: 'https://git.kernel.org/stable/c/44bd0ecc3444882d08ecfbc2b2418d2f463d3186'
  - url: 'https://git.kernel.org/stable/c/f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03'
  - url: 'https://git.kernel.org/stable/c/c8c8e895f65fbf71ea6224e27cf8dab91b776e0d'
  - url: 'https://git.kernel.org/stable/c/9f6989e477f03a4721d34bb4b09b17accd40283e'
  - url: 'https://git.kernel.org/stable/c/5974cb66681eac367107b05924744d7e3b49d41c'
  - url: 'https://git.kernel.org/stable/c/fdfb46c387241b4eddd36d746793764413285913'
  - url: 'https://git.kernel.org/stable/c/440915499231e9db1c361aa45bb702e8fd3b4a32'
tags:
  - cve.org
epss: 0.00129
epssPercentile: 0.02274
ingestedAt: '2026-10-16T19:46:24.300Z'
---

## Overview

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

serial: amba-pl011: synchronize DMA teardown

dmaengine_terminate_all() does not wait for a running callback, so the TX
callback can still touch the TX buffer after it is freed. The RX poll
timer reads the RX buffers without the port lock.

Switch to dmaengine_terminate_sync() and delete the RX timer before
freeing the buffers.

## Affected

- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e`
- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < 44bd0ecc3444882d08ecfbc2b2418d2f463d3186`
- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03`
- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < c8c8e895f65fbf71ea6224e27cf8dab91b776e0d`
- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < 9f6989e477f03a4721d34bb4b09b17accd40283e`
- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < 5974cb66681eac367107b05924744d7e3b49d41c`
- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < fdfb46c387241b4eddd36d746793764413285913`
- `Linux >= ead76f329f777c7301e0a5456a0a1c7a081570bd < 440915499231e9db1c361aa45bb702e8fd3b4a32`
- `Linux 2.6.39`

## Remediation

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