nf_tables: nft_dynset: fix possible stateful expression memleak in error path

{
  "id": "b1460f479052aacc9f9b364697e990174c934e46bc3c721f486021a2f48f1434",
  "url": "https://osv.dev/vulnerability/CVE-2026-23399",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nf_tables: nft_dynset: fix possible stateful expression memleak in error path",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: nf_tables: nft_dynset: fix possible stateful expression memleak in error path If cloning the second stateful expression in the element via GFP_ATOMIC fails, then the first stateful expression remains in place without being released. unreferenced object (percpu) 0x607b97e9cab8 (size 16): comm \"softirq\", pid 0, jiffies 4294931867 hex dump (first 16 bytes on cpu 3): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 backtrace (crc 0): pcpu_alloc_noprof+0x453/0xd80 nft_counter_clone+0x9c/0x190 [nf_tables] nft_expr_clone+0x8f/0x1b0 [nf_tables] nft_dynset_new+0x2cb/0x5f0 [nf_tables] nft_rhash_update+0x236/0x11c0 [nf_tables] nft_dynset_eval+0x11f/0x670 [nf_tables] nft_do_chain+0x253/0x1700 [nf_tables] nft_do_chain_ipv4+0x18d/0x270 [nf_tables] nf_hook_slow+0xaa/0x1e0 ip_local_deliver+0x209/0x330",
    "evidence": "osv:CVE-2026-23399",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.209",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.175",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.136",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.78",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.20",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23399",
      "aliases": [
        "CVE-2026-23399"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "563125a73ac30d7036ae69ca35c40500562c1de4"
                },
                {
                  "fixed": "eb7bf413e59945df03d4567b73ce464eebe2f4ea"
                },
                {
                  "fixed": "4357dbb1d9c35ca0b4443d71c98a48e6666f7689"
                },
                {
                  "fixed": "e6661add2d9c6913e1dad97336595e23a2bed195"
                },
                {
                  "fixed": "d1354873cbe3b344899c4311ac05897fd83e3f21"
                },
                {
                  "fixed": "31641c682db73353e4647e40735c7f2a75ff58ef"
                },
                {
                  "fixed": "c88a9fd26cee365bec932196f76175772a941cca"
                },
                {
                  "fixed": "0548a13b5a145b16e4da0628b5936baf35f51b43"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23399.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.209"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.175"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.136"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.78"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.20"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23399.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.229176001Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
        "https://git.kernel.org/stable/c/0548a13b5a145b16e4da0628b5936baf35f51b43",
        "https://git.kernel.org/stable/c/31641c682db73353e4647e40735c7f2a75ff58ef",
        "https://git.kernel.org/stable/c/4357dbb1d9c35ca0b4443d71c98a48e6666f7689",
        "https://git.kernel.org/stable/c/c88a9fd26cee365bec932196f76175772a941cca",
        "https://git.kernel.org/stable/c/d1354873cbe3b344899c4311ac05897fd83e3f21",
        "https://git.kernel.org/stable/c/e6661add2d9c6913e1dad97336595e23a2bed195",
        "https://git.kernel.org/stable/c/eb7bf413e59945df03d4567b73ce464eebe2f4ea",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23399.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23399",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23399.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23399",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518669,
  "published_at": "2026-03-28T07:16:09.888+00:00"
}