Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before 29365695842db0a97b701a43a09fad1b4f7ecf3e; affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before 7b9380c38c2fd2189416fa602bdbc5c8523b84b2; affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before eb2030137dba3b59cbb5057a33af70488d6bc231; affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before e4982c489ee359162eee3ece1fb36082648464a5; affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before 161f5860c92a8ec80b6bdff16e79d70dcd8afc5a; affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before 0ce42c7b84032335abff9eac43762e4ca8224451; affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before 1c43f5db482f74b41987c39c9c375a5e767556eb; affected 3ff7ddb1353da9b535e65702704cbadea1da9a00 before d313499df66159b4b7971d760d16729598ab7e5a |
| Linux / Linux | affected 5.8; unaffected 0 before 5.8; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/29365695842db0a97b701a43a09fad1b4f7ecf3e
- https://git.kernel.org/stable/c/7b9380c38c2fd2189416fa602bdbc5c8523b84b2
- https://git.kernel.org/stable/c/eb2030137dba3b59cbb5057a33af70488d6bc231
- https://git.kernel.org/stable/c/e4982c489ee359162eee3ece1fb36082648464a5
- https://git.kernel.org/stable/c/161f5860c92a8ec80b6bdff16e79d70dcd8afc5a
- https://git.kernel.org/stable/c/0ce42c7b84032335abff9eac43762e4ca8224451
- https://git.kernel.org/stable/c/1c43f5db482f74b41987c39c9c375a5e767556eb
- https://git.kernel.org/stable/c/d313499df66159b4b7971d760d16729598ab7e5a