Bug 2555038 (CVE-2026-98593) - CVE-2026-98593 kernel: s390/debug: Fix NULL pointer dereference in debug_info_copy()
Summary: CVE-2026-98593 kernel: s390/debug: Fix NULL pointer dereference in debug_info...
Keywords:
Status: NEW
Alias: CVE-2026-98593
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-18 15:40 UTC by OSIDB Bzimport
Modified: 2026-10-20 04:37 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-10-18 15:40:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

s390/debug: Fix NULL pointer dereference in debug_info_copy()

When debug_register_static() fails, it clears areas, active_pages and
active_entries but leaves the area bounds unchanged. Copying such an
area, either by opening its view file or via debug_dump(), makes
debug_info_copy() dereference the NULL pointers.

Skip the copy loop when the source has no areas.
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