CVE-2026-43035

Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak When building netlink messages, tc_chain_fill_node() never initializes the tcm_info field of struct tcmsg. Since the allocation is not zeroed, kernel heap memory is leaked to userspace through this 4-byte field. The fix simply zeroes tcm_info alongside the other fields that are already initialized.

References

• https://git.kernel.org/stable/c/1091b3c174441a52fdbb92e2fe00338f9371a91c
• https://git.kernel.org/stable/c/4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3
• https://git.kernel.org/stable/c/71a3eda7e850ae844cb8993065f4e410c11a46ce
• https://git.kernel.org/stable/c/903c3405cfcc7700260e456ab66a5867586c9e69
• https://git.kernel.org/stable/c/906997ea3766c24fbbf9cc4bf17c047315bbd138
• https://git.kernel.org/stable/c/d6db08484c6cb3d4ad696246f9d288eceba2a078
• https://git.kernel.org/stable/c/e35f5195cd44ff4053fbc5d71ea97681728a0099
• https://git.kernel.org/stable/c/e6e3eb5ee89ac4c163d46429391c889a1bb5e404