GHSA-3MPF-HFGC-G8P2
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-98322"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:24Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_nat: fully initialise new_addr in netmap setup\n\nnft_nat_setup_netmap() builds the mapped address in an on-stack\nunion nf_inet_addr. For an IPv4 mapping it writes only the 4-byte .ip\nmember and the loop runs a single 32-bit iteration, but it then copies\nthe whole 16-byte union into range-\u003emin_addr and range-\u003emax_addr, so the\nupper 12 bytes reach nf_nat_setup_info() uninitialised.\n\nKMSAN reports an uninit-value in nf_nat_setup_info() reached from\nnft_nat_eval(). The IPv6 path fills all 16 bytes and is not affected.\n\nZero-initialise new_addr.",
"id": "GHSA-3mpf-hfgc-g8p2",
"modified": "2026-10-06T09:31:35Z",
"published": "2026-10-06T09:31:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98322"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0ce42c7b84032335abff9eac43762e4ca8224451"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/161f5860c92a8ec80b6bdff16e79d70dcd8afc5a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1c43f5db482f74b41987c39c9c375a5e767556eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29365695842db0a97b701a43a09fad1b4f7ecf3e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7b9380c38c2fd2189416fa602bdbc5c8523b84b2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d313499df66159b4b7971d760d16729598ab7e5a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e4982c489ee359162eee3ece1fb36082648464a5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eb2030137dba3b59cbb5057a33af70488d6bc231"
}
],
"schema_version": "1.4.0",
"severity": []
}
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