CVE-2023-52488

Service interruption via FIFO regmap cache corruption

Published Feb 29, 2024 · Updated May 11, 2026

Improper FIFO cache handling in affected Linux kernels allows local users to interrupt service through SC16IS7XX serial I/O. The sc16is7xx FIFO routines use regmap_raw_read() and regmap_raw_write() for multi-byte, nonincrementing transfers, although those helpers assume incrementing register addresses and update the cache accordingly. Reaching the faulty path requires local access to a system using the SC16IS7XX device; the documented impact is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper FIFO cache handling in affected Linux kernels allows local users to interrupt service through SC16IS7XX serial I/O. The sc16is7xx FIFO routines use regmap_raw_read() and regmap_raw_write() for multi-byte, nonincrementing transfers, although those helpers assume incrementing register addresses and update the cache accordingly. Reaching the faulty path requires local access to a system using the SC16IS7XX device; the documented impact is limited to availability.

The record

CVE
CVE-2023-52488
Published
Feb 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.16
  2. Affected versionversion=dfeae619d781dee61666d5551b93ba3be755a86b <084c24e788d9cf29c55564de368bf5284f2bb5db
  3. Affected versionversion=dfeae619d781dee61666d5551b93ba3be755a86b <416b10d2817c94db86829fb92ad43ce7d002c573
  4. Affected versionversion=dfeae619d781dee61666d5551b93ba3be755a86b <4e37416e4ee1b1bc17364a68973e0c63be89e611
  5. Affected versionversion=dfeae619d781dee61666d5551b93ba3be755a86b <aa7cb4787698add9367b19f7afc667662c9bdb23
  6. Affected versionversion=dfeae619d781dee61666d5551b93ba3be755a86b <dbf4ab821804df071c8b566d9813083125e6d97b
  7. Affected versionversion=dfeae619d781dee61666d5551b93ba3be755a86b <e635f652696ef6f1230621cfd89c350cb5ec6169

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.16; version=dfeae619d781dee61666d5551b93ba3be755a86b <084c24e788d9cf29c55564de368bf5284f2bb5db; version=dfeae619d781dee61666d5551b93ba3be755a86b <416b10d2817c94db86829fb92ad43ce7d002c573; version=dfeae619d781dee61666d5551b93ba3be755a86b <4e37416e4ee1b1bc17364a68973e0c63be89e611; version=dfeae619d781dee61666d5551b93ba3be755a86b <aa7cb4787698add9367b19f7afc667662c9bdb23; version=dfeae619d781dee61666d5551b93ba3be755a86b <dbf4ab821804df071c8b566d9813083125e6d97b; version=dfeae619d781dee61666d5551b93ba3be755a86b <e635f652696ef6f1230621cfd89c350cb5ec6169

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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