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{"bugzilla": {"description": "kernel: net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak", "id": "2464411", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464411"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-908", "details": ["A flaw was found in the Linux kernel. A local user can exploit a vulnerability in the `tc_chain_fill_node()` function, which fails to initialize the `tcm_info` field of the `struct tcmsg` to zero. This oversight leads to an information disclosure, as uninitialized kernel heap memory is leaked to userspace through this 4-byte field. This could allow an attacker to gain sensitive information from the kernel's memory."], "name": "CVE-2026-43035", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43035\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43035\nhttps://lore.kernel.org/linux-cve-announce/2026050102-CVE-2026-43035-2731@gregkh/T"], "threat_severity": "Moderate"}

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