Bug 2370488 (CVE-2025-5745)

Summary: CVE-2025-5745 glibc: Vector register overwrite bug in glibc
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: ashankar, codonell, dj, fweimer, pfrankli
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the strncmp glibc function optimized for the Power10 architecture. Overwriting two vector registers could disrupt program control flow, possibly leading to system instability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2370511, 2370512    
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Description OSIDB Bzimport 2025-06-05 20:01:25 UTC 
The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program.