Bug 2516360 (CVE-2026-72101)

Summary: CVE-2026-72101 kernel: dm-integrity: fix leaking uninitialized kernel memory
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in dm-integrity, a component of the Linux kernel. This vulnerability occurs when the hash size is less than the device's tuple size, and dm-integrity fails to properly zero out the remaining memory space. This oversight can lead to the leaking of uninitialized kernel memory, potentially allowing an attacker to gain access to sensitive information.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-15 06:08:25 UTC
In the Linux kernel, the following vulnerability has been resolved:

dm-integrity: fix leaking uninitialized kernel memory

If hash size is less than device's tuple size, dm-integrity is supposed
to zero the remaining space. There was a bug in the code that zeroing
didn't work. This commit fixes it.