Bug 2541049 (CVE-2026-97980) - CVE-2026-97980 kernel: s390/debug: Fix NULL pointer dereference in debug_set_level()
Summary: CVE-2026-97980 kernel: s390/debug: Fix NULL pointer dereference in debug_set_...
Keywords:
Status: NEW
Alias: CVE-2026-97980
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-25 10:44 UTC by OSIDB Bzimport
Modified: 2026-09-30 06:48 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-25 10:44:57 UTC 
In the Linux kernel, the following vulnerability has been resolved:

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

Commit a2cec6863709 ("s390/debug: Add s390dbf kernel parameter")
incorrectly removed a null-id check from debug_set_level(), introducing
a possible NULL pointer dereference for debug-API users that put
debug_register() results unchecked into debug_set_level().

Fix this by moving the check from the internal _debug_set_level()
variant back to the external debug_set_level() wrapper.
Comment 1 gkamathe 2026-09-30 06:36:56 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97980.mbox
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