Bug 2554932 (CVE-2026-98651) - CVE-2026-98651 kernel: KVM: s390: Properly handle NULL pointer in dat_cond_set_storage_key()
Summary: CVE-2026-98651 kernel: KVM: s390: Properly handle NULL pointer in dat_cond_se...
Keywords:
Status: NEW
Alias: CVE-2026-98651
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 15:33 UTC by OSIDB Bzimport
Modified: 2026-10-21 20:27 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-18 15:33:32 UTC 
In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: Properly handle NULL pointer in dat_cond_set_storage_key()

Some callers pass NULL as oldkey. Calling page_cond_set_storage_key()
will cause that NULL pointer to get dereferenced.

Fix by checking for NULL and assigning the pointer to a dummy local
variable to avoid crashes.
Comment 1 Mauro Matteo Cascella 2026-10-21 20:18:56 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98651.mbox
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