Bug 2355486 (CVE-2022-49748)

Summary: CVE-2022-49748 kernel: perf/x86/amd: fix potential integer overflow on shift of a int
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: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the support for AMD processors in the Linux kernel. An improper left shift of a 32-bit integer can cause an integer overflow, possibly impacting system stability and resulting in a denial of service.
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Description OSIDB Bzimport 2025-03-27 17:03:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

perf/x86/amd: fix potential integer overflow on shift of a int

The left shift of int 32 bit integer constant 1 is evaluated using 32 bit
arithmetic and then passed as a 64 bit function argument. In the case where
i is 32 or more this can lead to an overflow.  Avoid this by shifting
using the BIT_ULL macro instead.
Comment 1 Robb Gatica 2025-03-27 22:16:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032759-CVE-2022-49748-4658@gregkh/T
Comment 5 Avinash Hanwate 2025-03-28 05:06:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032759-CVE-2022-49748-4658@gregkh/T