{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5"
            },
            {
              "fixed": "030c878eaedf0449e2b5401a0a0146d0afcc645e"
            },
            {
              "fixed": "d643cea4248668dc493c513aa7cbc6505eb1a4a9"
            },
            {
              "fixed": "d80677ad7aa5bebfccfd58caa4852b65abe70561"
            },
            {
              "fixed": "5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98031.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnexthop: Initialize extack in remove_nh_grp_entry()\n\nremove_nh_grp_entry() prints the extack message when a listener fails\nto replace the reduced nexthop group. However, extack is not\ninitialized and listeners are not required to set a message when\nreturning an error. Neither netdevsim nor mlxsw do so when an\nallocation fails, resulting in the dereference of an uninitialized\nstack pointer.\n\nFix by zero-initializing extack, as was done in commit 6347c5314cee\n(\"nexthop: initialize extack in nh_res_bucket_migrate()\").",
  "id": "CVE-2026-98031",
  "modified": "2026-09-27T03:30:15.434352943Z",
  "published": "2026-09-25T10:23:47.562Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/030c878eaedf0449e2b5401a0a0146d0afcc645e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d643cea4248668dc493c513aa7cbc6505eb1a4a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d80677ad7aa5bebfccfd58caa4852b65abe70561"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98031.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98031"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "nexthop: Initialize extack in remove_nh_grp_entry()"
}