{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43085","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.983Z","datePublished":"2026-05-06T07:40:19.915Z","dateUpdated":"2026-05-11T22:17:26.120Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:17:26.120Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator\n\nWhen batching multiple NFLOG messages (inst->qlen > 1), __nfulnl_send()\nappends an NLMSG_DONE terminator with sizeof(struct nfgenmsg) payload via\nnlmsg_put(), but never initializes the nfgenmsg bytes. The nlmsg_put()\nhelper only zeroes alignment padding after the payload, not the payload\nitself, so four bytes of stale kernel heap data are leaked to userspace\nin the NLMSG_DONE message body.\n\nUse nfnl_msg_put() to build the NLMSG_DONE terminator, which initializes\nthe nfgenmsg payload via nfnl_fill_hdr(), consistent with how\n__build_packet_message() already constructs NFULNL_MSG_PACKET headers."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nfnetlink_log.c"],"versions":[{"version":"29c5d4afba51c71cfeadd3f74f3c42e064483fb0","lessThan":"368c22aea490f6f50df831b4f9e3623787686c5b","status":"affected","versionType":"git"},{"version":"29c5d4afba51c71cfeadd3f74f3c42e064483fb0","lessThan":"d1399632ba255d2e02c757af5d9f5d9279ce168c","status":"affected","versionType":"git"},{"version":"29c5d4afba51c71cfeadd3f74f3c42e064483fb0","lessThan":"d552bcfca323d175664d7444989b04f55666978a","status":"affected","versionType":"git"},{"version":"29c5d4afba51c71cfeadd3f74f3c42e064483fb0","lessThan":"15d209bccf9273b4a8b4e579ba0e92d065b6ec8c","status":"affected","versionType":"git"},{"version":"29c5d4afba51c71cfeadd3f74f3c42e064483fb0","lessThan":"1f3083aec8836213da441270cdb1ab612dd82cf4","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nfnetlink_log.c"],"versions":[{"version":"2.6.23","status":"affected"},{"version":"0","lessThan":"2.6.23","status":"unaffected","versionType":"semver"},{"version":"6.6.136","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.83","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/368c22aea490f6f50df831b4f9e3623787686c5b"},{"url":"https://git.kernel.org/stable/c/d1399632ba255d2e02c757af5d9f5d9279ce168c"},{"url":"https://git.kernel.org/stable/c/d552bcfca323d175664d7444989b04f55666978a"},{"url":"https://git.kernel.org/stable/c/15d209bccf9273b4a8b4e579ba0e92d065b6ec8c"},{"url":"https://git.kernel.org/stable/c/1f3083aec8836213da441270cdb1ab612dd82cf4"}],"title":"netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator","x_generator":{"engine":"bippy-1.2.0"}}}}