{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b69a2afd5afce9bf6d56e349d6ab592c916e20f2"
            },
            {
              "fixed": "43308106a1762b72f3b20a44b75b2df5cb25b77b"
            },
            {
              "fixed": "f11d7d088f5ed54b31c6735854c12845eb60eb4a"
            },
            {
              "fixed": "9e1f51c1ad57cc76a0e8b5eb27038f8973fff4fa"
            },
            {
              "fixed": "5366ec7d2f793ce703c403d7fd4c25a3db365b9d"
            },
            {
              "fixed": "10d1c75ed4382a8e79874379caa2ead8952734f9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.77"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.16"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43129.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nima: verify the previous kernel's IMA buffer lies in addressable RAM\n\nPatch series \"Address page fault in ima_restore_measurement_list()\", v3.\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=\u003csize\u003e\" we observe a pafe fault that happens.\n\n    BUG: unable to handle page fault for address: ffff97793ff47000\n    RIP: ima_restore_measurement_list+0xdc/0x45a\n    #PF: error_code(0x0000)  not-present page\n\nThis happens on x86_64 only, as this is already fixed in aarch64 in\ncommit: cbf9c4b9617b (\"of: check previous kernel's ima-kexec-buffer\nagainst memory bounds\")\n\n\nThis patch (of 3):\n\nWhen the second-stage kernel is booted with a limiting command line (e.g. \n\"mem=\u003csize\u003e\"), the IMA measurement buffer handed over from the previous\nkernel may fall outside the addressable RAM of the new kernel.  Accessing\nsuch a buffer can fault during early restore.\n\nIntroduce a small generic helper, ima_validate_range(), which verifies\nthat a physical [start, end] range for the previous-kernel IMA buffer lies\nwithin addressable memory:\n\t- On x86, use pfn_range_is_mapped().\n\t- On OF based architectures, use page_is_ram().",
  "id": "CVE-2026-43129",
  "modified": "2026-07-15T01:49:02.531616337Z",
  "published": "2026-05-06T11:27:18.180Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/10d1c75ed4382a8e79874379caa2ead8952734f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43308106a1762b72f3b20a44b75b2df5cb25b77b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5366ec7d2f793ce703c403d7fd4c25a3db365b9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e1f51c1ad57cc76a0e8b5eb27038f8973fff4fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f11d7d088f5ed54b31c6735854c12845eb60eb4a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43129.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43129"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "ima: verify the previous kernel's IMA buffer lies in addressable RAM"
}