CVE-2025-37977

Service interruption via incompatible UFS cache configuration

Published May 20, 2025 · Updated Aug 5, 2026

Configuration error in Linux kernel releases beginning at 5.16 allows local users to interrupt service through Exynos UFS cache instability. The Exynos UFS driver leaves IOCC shareability enabled when dma-coherent is absent, although the resulting descriptors are non-cacheable. Exposure requires ExynosAuto v9 UFS with that device-tree property absent; published material describes random stability failures rather than a deterministic crash.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Configuration error in Linux kernel releases beginning at 5.16 allows local users to interrupt service through Exynos UFS cache instability. The Exynos UFS driver leaves IOCC shareability enabled when dma-coherent is absent, although the resulting descriptors are non-cacheable. Exposure requires ExynosAuto v9 UFS with that device-tree property absent; published material describes random stability failures rather than a deterministic crash.

The record

CVE
CVE-2025-37977
Published
May 20, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.16
  2. Affected versionversion=cc52e15397cc5dc773d3c6792b98352d3209f93f <869749e48115ef944eeabec8e84138908471fa51
  3. Affected versionversion=cc52e15397cc5dc773d3c6792b98352d3209f93f <f0c6728a6f2e269ebb234a9b5bb6c2c24aafeb51
  4. Affected versionversion=cc52e15397cc5dc773d3c6792b98352d3209f93f <f92bb7436802f8eb7ee72dc911a33c8897fde366

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=cc52e15397cc5dc773d3c6792b98352d3209f93f <869749e48115ef944eeabec8e84138908471fa51; version=cc52e15397cc5dc773d3c6792b98352d3209f93f <f0c6728a6f2e269ebb234a9b5bb6c2c24aafeb51; version=cc52e15397cc5dc773d3c6792b98352d3209f93f <f92bb7436802f8eb7ee72dc911a33c8897fde366

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

No sourced classifications are available.

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

See the directory against your own environment.

Your stack

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