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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-21694 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: fs/proc: fix softlockup in __read_vmcore (part 2) Since commit 5cbcb62dddf5 ("fs/proc: fix softlockup in __read_vmcore") the number of softlockups in __read_vmcore at kdump time have gone down, but they still happen sometimes. In a memory constrained environment like the kdump image, a softlockup is not just a harmless message, but it can interfere with things like RCU freeing memory, causing the crashdump to get stuck. The second loop in __read_vmcore has a lot more opportunities for natural sleep points, like scheduling out while waiting for a data write to happen, but apparently that is not always enough. Add a cond_resched() to the second loop in __read_vmcore to (hopefully) get rid of the softlockups.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-265688.html siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-355557.html siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-398330.html siemens-SADP
https://git.kernel.org/stable/c/649b266606bc413407ce315f710c8ce8a88ee30a kernel.org Patch 
https://git.kernel.org/stable/c/65c367bd9d4f43513c7f837df5753bea9561b836 kernel.org Patch 
https://git.kernel.org/stable/c/80828540dad0757b6337c6561d49c81038f38d87 kernel.org Patch 
https://git.kernel.org/stable/c/80da29deb88a3a907441fc35bb7bac309f31e713 kernel.org Patch 
https://git.kernel.org/stable/c/84c4ed15626574c9ac6c1039ba9c137a77bcc7f2 kernel.org Patch 
https://git.kernel.org/stable/c/a5a2ee8144c3897d37403a69118c3e3dc5713958 kernel.org Patch 
https://git.kernel.org/stable/c/cbc5dde0a461240046e8a41c43d7c3b76d5db952 kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html CVE
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html CVE

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-21694
NVD Published Date:
02/12/2025
NVD Last Modified:
05/12/2026
Source:
kernel.org