Bug 2424871 (CVE-2025-68378)

Summary: CVE-2025-68378 kernel: bpf: Fix stackmap overflow check in __bpf_get_stackid()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-24 11:02:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix stackmap overflow check in __bpf_get_stackid()

Syzkaller reported a KASAN slab-out-of-bounds write in __bpf_get_stackid()
when copying stack trace data. The issue occurs when the perf trace
 contains more stack entries than the stack map bucket can hold,
 leading to an out-of-bounds write in the bucket's data array.
Comment 1 Alexander B 2025-12-25 16:29:12 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122403-CVE-2025-68378-60d1@gregkh/T