CVE-2025-37883

Local kernel crash via unchecked page allocation

Published May 9, 2025 · Updated May 11, 2026

NULL pointer dereference in the s390 SCLP console in affected Linux kernel versions allows local users to crash the kernel during initialization. The sclp_console_init function fails to check whether get_zeroed_page returned a null address before using the allocation for its console-page list. Reachability requires a low-privileged local user on an s390 system using the SCLP console and an allocation failure during initialization; the bounded consequence is an availability-only kernel crash.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the s390 SCLP console in affected Linux kernel versions allows local users to crash the kernel during initialization. The sclp_console_init function fails to check whether get_zeroed_page returned a null address before using the allocation for its console-page list. Reachability requires a low-privileged local user on an s390 system using the SCLP console and an allocation failure during initialization; the bounded consequence is an availability-only kernel crash.

The record

CVE
CVE-2025-37883
Published
May 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2025CVE 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=2.6.31
  2. Affected versionversion=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <28e5a867aa542e369e211c2baba7044228809a99
  3. Affected versionversion=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <397254706eba9d8f99fd237feede7ab3169a7f9a
  4. Affected versionversion=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <3b3aa72636a6205933609ec274a8747720c1ee3f
  5. Affected versionversion=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <3db42c75a921854a99db0a2775814fef97415bac
  6. Affected versionversion=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <e1e00dc45648125ef7cb87ebc3b581ac224e7b39
  7. Affected versionversion=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <f69f8a93aacf6e99af7b1cc992d8ca2cc07b96fb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.31; version=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <28e5a867aa542e369e211c2baba7044228809a99; version=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <397254706eba9d8f99fd237feede7ab3169a7f9a; version=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <3b3aa72636a6205933609ec274a8747720c1ee3f; version=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <3db42c75a921854a99db0a2775814fef97415bac; version=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <e1e00dc45648125ef7cb87ebc3b581ac224e7b39; version=4c8f4794b61e89dd68f96cfc23a9d9b6c25be420 <f69f8a93aacf6e99af7b1cc992d8ca2cc07b96fb

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

CWE-476NULL Pointer Dereference
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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