CVE-2023-53314

Service interruption via framebuffer device reference mismanagement

Published Sep 16, 2025 · Updated Sep 16, 2025

Reference-counting error in the Linux kernel allows local users to interrupt service through the ep93xx framebuffer driver's removal path. The ep93xxfb_probe function overwrites the fb_info.dev ownership slot that register_framebuffer must initialize, so teardown drops the hardware device's reference and leaves the framebuffer device unreleased. Low-privileged local access and an active EP93xx framebuffer configuration are required; the resulting availability loss is a service interruption of an unspecified form.

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

What happened

Reference-counting error in the Linux kernel allows local users to interrupt service through the ep93xx framebuffer driver's removal path. The ep93xxfb_probe function overwrites the fb_info.dev ownership slot that register_framebuffer must initialize, so teardown drops the hardware device's reference and leaves the framebuffer device unreleased. Low-privileged local access and an active EP93xx framebuffer configuration are required; the resulting availability loss is a service interruption of an unspecified form.

The record

CVE
CVE-2023-53314
Published
Sep 16, 2025
Updated
Sep 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2025Record 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=2.6.32
  2. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <0517fc5a71333b315164736bbd32608894fbb872
  3. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <1c6ff2a7c593db851f23e31ace2baf557ea9d0ff
  4. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <309c27162afea79b3c7f8747bb650faf6923b639
  5. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <4aade6c9100a3537788b6a9c7ac481037d19efdf
  6. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972
  7. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <f83c1b13f8154e0284448912756d0a351a1a602a
  8. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <f90a0e5265b60cdd3c77990e8105f79aa2fac994
  9. Affected versionversion=88017bda96a5fd568a982b01546c8fb1782dda62 <ffdf2b020db717853167391a3a8d912e13428fa6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.32; version=88017bda96a5fd568a982b01546c8fb1782dda62 <0517fc5a71333b315164736bbd32608894fbb872; version=88017bda96a5fd568a982b01546c8fb1782dda62 <1c6ff2a7c593db851f23e31ace2baf557ea9d0ff; version=88017bda96a5fd568a982b01546c8fb1782dda62 <309c27162afea79b3c7f8747bb650faf6923b639; version=88017bda96a5fd568a982b01546c8fb1782dda62 <4aade6c9100a3537788b6a9c7ac481037d19efdf; version=88017bda96a5fd568a982b01546c8fb1782dda62 <8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972; version=88017bda96a5fd568a982b01546c8fb1782dda62 <f83c1b13f8154e0284448912756d0a351a1a602a; version=88017bda96a5fd568a982b01546c8fb1782dda62 <f90a0e5265b60cdd3c77990e8105f79aa2fac994; version=88017bda96a5fd568a982b01546c8fb1782dda62 <ffdf2b020db717853167391a3a8d912e13428fa6

Published CVSS scores

5.5CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS: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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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