Bug 2525428 (CVE-2026-80679) - CVE-2026-80679 kernel: s390/dasd: Fix potential NULL pointer dereference
Summary: CVE-2026-80679 kernel: s390/dasd: Fix potential NULL pointer dereference
Keywords:
Status: NEW
Alias: CVE-2026-80679
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: 2026-08-28 07:44 UTC by OSIDB Bzimport
Modified: 2026-08-31 13:32 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-28 07:44:29 UTC 
In the Linux kernel, the following vulnerability has been resolved:

s390/dasd: Fix potential NULL pointer dereference

dasd_release_space() checks the implementation of the is_ese()
discipline function before calling it to determine if a given device is
an ESE DASD.

The current usage of the logical AND operator will lead to a NULL
pointer dereference as the function is called even if the function
pointer is NULL.

Fix this by using the logical OR operator.
Comment 1 gkamathe 2026-08-31 13:26:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082801-CVE-2026-80679-b60a@gregkh/T
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