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CVE-2026-98322

unscored Published
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_nat: fully initialise new_addr in netmap setup nft_nat_setup_netmap() builds the mapped address in an on-stack union nf_inet_addr. For an IPv4 mapping it writes only the 4-byte .ip member and the loop runs a single 32-bit iteration, but it then copies the whole 16-byte union into range->min_addr and range->max_addr, so the upper 12 bytes reach nf_nat_setup_info() uninitialised. KMSAN reports an uninit-value in nf_nat_setup_info() reached from nft_nat_eval(). The IPv6 path fills all 16 bytes and is not affected. Zero-initialise new_addr.

Fix

Microsoft's update · Critical

  • Release Notes — azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 · build 6.6.158.1-1

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-28.

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 2

  1. StatusReceived → PublishedNVD modified 2026-10-19 09:17
  2. First seenunscoredNVD modified 2026-10-19 10:18

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 8