Bug 2418871 (CVE-2025-40253) - CVE-2025-40253 kernel: s390/ctcm: Fix double-kfree
Summary: CVE-2025-40253 kernel: s390/ctcm: Fix double-kfree
Keywords:
Status: NEW
Alias: CVE-2025-40253
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-04 17:02 UTC by OSIDB Bzimport
Modified: 2025-12-18 12:55 UTC (History)
0 users

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-12-04 17:02:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

s390/ctcm: Fix double-kfree

The function 'mpc_rcvd_sweep_req(mpcginfo)' is called conditionally
from function 'ctcmpc_unpack_skb'. It frees passed mpcginfo.
After that a call to function 'kfree' in function 'ctcmpc_unpack_skb'
frees it again.

Remove 'kfree' call in function 'mpc_rcvd_sweep_req(mpcginfo)'.

Bug detected by the clang static analyzer.
Comment 1 Alexander B 2025-12-05 14:33:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120431-CVE-2025-40253-e855@gregkh/T
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