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High severity7.0NVD Advisory· Published Jul 25, 2026· Updated Oct 19, 2026

CVE-2026-64413

CVE-2026-64413

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

11
  • Linux/Kernel9 versions
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=2.6.12.1,<5.10.261
    • cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:*
    • (no CPE)
  • osv-coords2 versions
    pkg:linux/kernelpkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweed
    >= 2.6.12, < 5.10.261+ 1 more
    • (no CPE)range: >= 2.6.12, < 5.10.261
    • (no CPE)range: < 7.1.7-1.1

Patches

Vulnerability mechanics

References

10

News mentions

1