Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator When batching multiple NFLOG messages (inst->qlen > 1), __nfulnl_send() appends an NLMSG_DONE terminator with sizeof(struct nfgenmsg) payload via nlmsg_put(), but never initializes the nfgenmsg bytes. The nlmsg_put() helper only zeroes alignment padding after the payload, not the payload itself, so four bytes of stale kernel heap data are leaked to userspace in the NLMSG_DONE message body. Use nfnl_msg_put() to build the NLMSG_DONE terminator, which initializes the nfgenmsg payload via nfnl_fill_hdr(), consistent with how __build_packet_message() already constructs NFULNL_MSG_PACKET headers.
Product status
29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (git) before 368c22aea490f6f50df831b4f9e3623787686c5b
29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (git) before d1399632ba255d2e02c757af5d9f5d9279ce168c
29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (git) before d552bcfca323d175664d7444989b04f55666978a
29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (git) before 15d209bccf9273b4a8b4e579ba0e92d065b6ec8c
29c5d4afba51c71cfeadd3f74f3c42e064483fb0 (git) before 1f3083aec8836213da441270cdb1ab612dd82cf4
2.6.23
Any version before 2.6.23
6.6.136 (semver)
6.12.83 (semver)
6.18.24 (semver)
6.19.14 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/368c22aea490f6f50df831b4f9e3623787686c5b
git.kernel.org/...c/d1399632ba255d2e02c757af5d9f5d9279ce168c
git.kernel.org/...c/d552bcfca323d175664d7444989b04f55666978a
git.kernel.org/...c/15d209bccf9273b4a8b4e579ba0e92d065b6ec8c
git.kernel.org/...c/1f3083aec8836213da441270cdb1ab612dd82cf4