2406752 – (CVE-2025-40057) CVE-2025-40057 kernel: ptp: Add a upper bound on max_vclocks

Bug 2406752 (CVE-2025-40057) - CVE-2025-40057 kernel: ptp: Add a upper bound on max_vclocks

Summary: CVE-2025-40057 kernel: ptp: Add a upper bound on max_vclocks

Keywords:
Status:	NEW
Alias:	CVE-2025-40057
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Product Security
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2025-10-28 12:03 UTC by OSIDB Bzimport
Modified:	2025-10-28 18:41 UTC (History)
CC List:	0 users
Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments	(Terms of Use)

Description OSIDB Bzimport 2025-10-28 12:03:36 UTC

In the Linux kernel, the following vulnerability has been resolved:

ptp: Add a upper bound on max_vclocks

syzbot reported WARNING in max_vclocks_store.

This occurs when the argument max is too large for kcalloc to handle.

Extend the guard to guard against values that are too large for
kcalloc

Comment 1 Jon Moroney 2025-10-28 18:39:25 UTC Comment hidden (spam)

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