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…
Does this matter?
Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-908
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1091b3c174441a52fdbb92e2fe00338f9371a91cPatch
- https://git.kernel.org/stable/c/4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3Patch
- https://git.kernel.org/stable/c/71a3eda7e850ae844cb8993065f4e410c11a46cePatch
- https://git.kernel.org/stable/c/903c3405cfcc7700260e456ab66a5867586c9e69Patch
- https://git.kernel.org/stable/c/906997ea3766c24fbbf9cc4bf17c047315bbd138Patch
- https://git.kernel.org/stable/c/d6db08484c6cb3d4ad696246f9d288eceba2a078Patch
- https://git.kernel.org/stable/c/e35f5195cd44ff4053fbc5d71ea97681728a0099Patch
- https://git.kernel.org/stable/c/e6e3eb5ee89ac4c163d46429391c889a1bb5e404Patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.