Bug 2348643 (CVE-2024-58017)

Summary: CVE-2024-58017 kernel: printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-27 03:06:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX

Shifting 1 << 31 on a 32-bit int causes signed integer overflow, which
leads to undefined behavior. To prevent this, cast 1 to u32 before
performing the shift, ensuring well-defined behavior.

This change explicitly avoids any potential overflow by ensuring that
the shift occurs on an unsigned 32-bit integer.
Comment 1 Michal Findra 2025-02-27 20:59:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022657-CVE-2024-58017-fb48@gregkh/T