CVE-2026-23098 (GCVE-0-2026-23098)
Vulnerability from cvelistv5
Published
2026-02-04 16:08
Modified
2026-04-03 13:31
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netrom: fix double-free in nr_route_frame() In nr_route_frame(), old_skb is immediately freed without checking if nr_neigh->ax25 pointer is NULL. Therefore, if nr_neigh->ax25 is NULL, the caller function will free old_skb again, causing a double-free bug. Therefore, to prevent this, we need to modify it to check whether nr_neigh->ax25 is NULL before freeing old_skb.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: fix double-free in nr_route_frame()\n\nIn nr_route_frame(), old_skb is immediately freed without checking if\nnr_neigh-\u003eax25 pointer is NULL. Therefore, if nr_neigh-\u003eax25 is NULL,\nthe caller function will free old_skb again, causing a double-free bug.\n\nTherefore, to prevent this, we need to modify it to check whether\nnr_neigh-\u003eax25 is NULL before freeing old_skb."
        }
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            "version": "3.1"
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        "dateUpdated": "2026-04-03T13:31:55.725Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/6e0110ea90313b7c0558a0b77038274a6821caf8"
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        {
          "url": "https://git.kernel.org/stable/c/ba1096c315283ee3292765f6aea4cca15816c4f7"
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      "title": "netrom: fix double-free in nr_route_frame()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23098",
    "datePublished": "2026-02-04T16:08:20.692Z",
    "dateReserved": "2026-01-13T15:37:45.964Z",
    "dateUpdated": "2026-04-03T13:31:55.725Z",
    "state": "PUBLISHED"
  },
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}


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