{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "32a4f5ecd7381f30ae3bb36dea77a150ba68af2e"
            },
            {
              "fixed": "903c3405cfcc7700260e456ab66a5867586c9e69"
            },
            {
              "fixed": "71a3eda7e850ae844cb8993065f4e410c11a46ce"
            },
            {
              "fixed": "4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3"
            },
            {
              "fixed": "e35f5195cd44ff4053fbc5d71ea97681728a0099"
            },
            {
              "fixed": "d6db08484c6cb3d4ad696246f9d288eceba2a078"
            },
            {
              "fixed": "906997ea3766c24fbbf9cc4bf17c047315bbd138"
            },
            {
              "fixed": "1091b3c174441a52fdbb92e2fe00338f9371a91c"
            },
            {
              "fixed": "e6e3eb5ee89ac4c163d46429391c889a1bb5e404"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.19.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.134"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.81"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.22"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43035.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak\n\nWhen building netlink messages, tc_chain_fill_node() never initializes\nthe tcm_info field of struct tcmsg. Since the allocation is not zeroed,\nkernel heap memory is leaked to userspace through this 4-byte field.\n\nThe fix simply zeroes tcm_info alongside the other fields that are\nalready initialized.",
  "id": "CVE-2026-43035",
  "modified": "2026-07-08T05:36:31.431585147Z",
  "published": "2026-05-01T14:15:33.922Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1091b3c174441a52fdbb92e2fe00338f9371a91c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/71a3eda7e850ae844cb8993065f4e410c11a46ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/903c3405cfcc7700260e456ab66a5867586c9e69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/906997ea3766c24fbbf9cc4bf17c047315bbd138"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6db08484c6cb3d4ad696246f9d288eceba2a078"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e35f5195cd44ff4053fbc5d71ea97681728a0099"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6e3eb5ee89ac4c163d46429391c889a1bb5e404"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43035.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43035"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak"
}