CVE-2026-98322

netfilter: nft_nat: fully initialise new_addr in netmap setup

State: Published
Severity: Not scored
Published: Oct 6, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 29365695842db0a97b701a43a09fad1b4f7ecf3eAffected 3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 7b9380c38c2fd2189416fa602bdbc5c8523b84b2Affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 to before eb2030137dba3b59cbb5057a33af70488d6bc231Affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 to before e4982c489ee359162eee3ece1fb36082648464a5Affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 161f5860c92a8ec80b6bdff16e79d70dcd8afc5aAffected 3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 0ce42c7b84032335abff9eac43762e4ca8224451Affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 1c43f5db482f74b41987c39c9c375a5e767556ebAffected 3ff7ddb1353da9b535e65702704cbadea1da9a00 to before d313499df66159b4b7971d760d16729598ab7e5aAffected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.54 through 6.18.Not affected 7.2.8 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 29365695842db0a97b701a43a09fad1b4f7ecf3eAffected
3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 7b9380c38c2fd2189416fa602bdbc5c8523b84b2Affected
3ff7ddb1353da9b535e65702704cbadea1da9a00 to before eb2030137dba3b59cbb5057a33af70488d6bc231Affected
3ff7ddb1353da9b535e65702704cbadea1da9a00 to before e4982c489ee359162eee3ece1fb36082648464a5Affected
3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 161f5860c92a8ec80b6bdff16e79d70dcd8afc5aAffected
3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 0ce42c7b84032335abff9eac43762e4ca8224451Affected
3ff7ddb1353da9b535e65702704cbadea1da9a00 to before 1c43f5db482f74b41987c39c9c375a5e767556ebAffected
3ff7ddb1353da9b535e65702704cbadea1da9a00 to before d313499df66159b4b7971d760d16729598ab7e5aAffected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.54 through 6.18.*Not affected
7.2.8 through 7.2.*Not affected
7.3 and laterNot affected

References

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