7.8

CVE-2023-53094: tty: serial: fsl_lpuart: fix race on RX DMA shutdown

Modified
AliasesUBUNTU-CVE-2023-53094DEBIAN-CVE-2023-53094
Published 02-05-2025Last modified 05-08-2026

Vulnerability summary

CVE-2023-53094 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
RHSA-2024:2394SUSE-SU-2025:01983-1

Timeline

  1. 02-05-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: tty: serial: fsl_lpuart: fix race on RX DMA shutdown From time to time DMA completion can come in the middle of DMA shutdown: <process ctx>: <IRQ>: lpuart32_shutdown() lpuart_dma_shutdown() del_timer_sync() lpuart_dma_rx_complete() lpuart_copy_rx_to_tty() mod_timer() lpuart_dma_rx_free() When the timer fires a bit later, sport->dma_rx_desc is NULL: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004 pc : lpuart_copy_rx_to_tty+0xcc/0x5bc lr : lpuart_timer_func+0x1c/0x2c Call trace: lpuart_copy_rx_to_tty lpuart_timer_func call_timer_fn __run_timers.part.0 run_timer_softirq __do_softirq __irq_exit_rcu irq_exit handle_domain_irq gic_handle_irq call_on_irq_stack do_interrupt_handler ... To fix this fold del_timer_sync() into lpuart_dma_rx_free() after dmaengine_terminate_sync() to make sure timer will not be re-started in lpuart_copy_rx_to_tty() <= lpuart_dma_rx_complete().

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.15% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu116 products
  • linuxAll versions (No fix recorded) | < 5.15.0-79.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1042.47
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4a8588a1cf867333187d9ff071e6fbdab587d194, < 19a98d56dfedafb25652bdb9cd48a4e73ceba702 | ≥ 4a8588a1cf867333187d9ff071e6fbdab587d194, < 90530e7214c8a04dcdde57502d93fa96af288c38 | ≥ 4a8588a1cf867333187d9ff071e6fbdab587d194, < 954fc9931f0aabf272b5674cf468affdd88d3a36 | ≥ 4a8588a1cf867333187d9ff071e6fbdab587d194, < 2a36b444cace9580380467fd1183bb5e85bcc80a | ≥ 4a8588a1cf867333187d9ff071e6fbdab587d194, < 1be6f2b15f902c02e055ae0b419ca789200473c9 | 5716a781032693d0f812ed06528d98195e9df028 | 0d5cb6e8b4b62d8efd1a470615894276341d6db9 | ≥ 3.18.9, < 3.19 | ≥ 3.19.1, < 3.20 | 4.0
  • linux_kernel≥ 3.18.9, < 3.19 | ≥ 3.19.1, < 5.10.177 | ≥ 5.11, < 5.15.105 | ≥ 5.16, < 6.1.23 | ≥ 6.2, < 6.2.8 | 6.3:rc1 | 6.3:rc2
Debian1 product
  • linux< 6.1.25-1

3 vendors · 119 products

References

9 links