CVE-2026-43339 (GCVE-0-2026-43339)
Vulnerability from cvelistv5
Published
2026-05-08 13:31
Modified
2026-05-11 22:22
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent possible UaF in addrconf_permanent_addr() The mentioned helper try to warn the user about an exceptional condition, but the message is delivered too late, accessing the ipv6 after its possible deletion. Reorder the statement to avoid the possible UaF; while at it, place the warning outside the idev->lock as it needs no protection.
References
Impacted products
Vendor Product Version
Linux Linux Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
Version: f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac
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{
  "containers": {
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          "programFiles": [
            "net/ipv6/addrconf.c"
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      "cpeApplicability": [
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent possible UaF in addrconf_permanent_addr()\n\nThe mentioned helper try to warn the user about an exceptional\ncondition, but the message is delivered too late, accessing the ipv6\nafter its possible deletion.\n\nReorder the statement to avoid the possible UaF; while at it, place the\nwarning outside the idev-\u003elock as it needs no protection."
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:22:39.430Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eec49a33611f20336b357b3953df44f1a02049e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/bacc7f31085c9820922f00bc7d79756ffa13123a"
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        {
          "url": "https://git.kernel.org/stable/c/7bfafa1b0cd582983ebec6bb20f0a435528fe567"
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          "url": "https://git.kernel.org/stable/c/7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e"
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        },
        {
          "url": "https://git.kernel.org/stable/c/2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1"
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        {
          "url": "https://git.kernel.org/stable/c/fd63f185979b047fb22a0dfc6bd94d0cab6a6a70"
        }
      ],
      "title": "ipv6: prevent possible UaF in addrconf_permanent_addr()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43339",
    "datePublished": "2026-05-08T13:31:24.315Z",
    "dateReserved": "2026-05-01T14:12:56.003Z",
    "dateUpdated": "2026-05-11T22:22:39.430Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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