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Vulnerabilities CVE-2026-64413

CVE-2026-64413

None
Open
TLP:CLEAR

netfilter: ebtables: zero chainstack array

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Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: zero chainstack array sashiko reports: looking at ebtables table translation, could a sparse cpu_possible_mask lead to an uninitialized pointer free? If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible, but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at CPU 2, the cleanup loop will blindly decrement and call vfree() on newinfo->chainstack[1]. Not a real-world bug, such allocation isn't expected to fail in the first place.

Details

EPSS Score
0.12%

2.3th percentile

Confidence
90%
Published
Jul 25, 2026
Last Modified
Jul 25, 2026
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