CVE-2026-43035: Linux vulnerability

CVE-2026-43035: net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak

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.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 15, 2026, 01:18 UTC (UTC+00:00)

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 1, 2026, 14:15 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

1ADP providers

12Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
May 1, 2026, 14:12 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
May 1, 2026, 14:15 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 15, 2026, 01:18 UTC (UTC+00:00)

ADP provider summaries

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/903c3405cfcc7700260e456ab66a5867586c9e69CVE reference, Linux
https://git.kernel.org/stable/c/71a3eda7e850ae844cb8993065f4e410c11a46ceCVE reference, Linux
https://git.kernel.org/stable/c/4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3CVE reference, Linux
https://git.kernel.org/stable/c/e35f5195cd44ff4053fbc5d71ea97681728a0099CVE reference, Linux
https://git.kernel.org/stable/c/d6db08484c6cb3d4ad696246f9d288eceba2a078CVE reference, Linux
https://git.kernel.org/stable/c/906997ea3766c24fbbf9cc4bf17c047315bbd138CVE reference, Linux
https://git.kernel.org/stable/c/1091b3c174441a52fdbb92e2fe00338f9371a91cCVE reference, Linux
https://git.kernel.org/stable/c/e6e3eb5ee89ac4c163d46429391c889a1bb5e404CVE reference, Linux
https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlCVE reference, siemens-SADP

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinux32a4f5ecd7381f30ae3bb36dea77a150ba68af2e, 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e, 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e, 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e, 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e, 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e, 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e, 32a4f5ecd7381f30ae3bb36dea77a150ba68af2eunaffected

LinuxLinux4.19, 0, 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0affected

Weakness

CWE details

No CWE listed

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