Bug 2297578 (CVE-2024-40994)

Summary: CVE-2024-40994 kernel: ptp: fix integer overflow in max_vclocks_store
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: kernel 5.15.162, kernel 6.1.96, kernel 6.6.36, kernel 6.9.7, kernel 6.10-rc5 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the Linux kernel's ptp subsystem in ptp_sysfs.c file, where the max_vclocks_store function can cause an integer overflow on 32-bit systems. This issue occurs during a multiplication operation, potentially leading to incorrect memory allocation, resulting in memory corruption.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2024-07-12 13:48:26 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ptp: fix integer overflow in max_vclocks_store

On 32bit systems, the "4 * max" multiply can overflow.  Use kcalloc()
to do the allocation to prevent this.