CVE-2026-43035

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-908

Published

2026-05-01

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

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

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