Bug 2373633 (CVE-2022-50167)

Summary: CVE-2022-50167 kernel: bpf: fix potential 32-bit overflow when accessing ARRAY map element
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-06-18 12:11:33 UTC 
In the Linux kernel, the following vulnerability has been resolved:

bpf: fix potential 32-bit overflow when accessing ARRAY map element

If BPF array map is bigger than 4GB, element pointer calculation can
overflow because both index and elem_size are u32. Fix this everywhere
by forcing 64-bit multiplication. Extract this formula into separate
small helper and use it consistently in various places.

Speculative-preventing formula utilizing index_mask trick is left as is,
but explicit u64 casts are added in both places.
Comment 1 Avinash Hanwate 2025-06-19 00:33:54 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061827-CVE-2022-50167-e4bf@gregkh/T