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GHSA-VFH6-R892-92WV

Vulnerability from github – Published: 2026-03-28 09:31 – Updated: 2026-09-08 09:35
VLAI
Details

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

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-23399"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-28T08:15:56Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnf_tables: nft_dynset: fix possible stateful expression memleak in error path\n\nIf cloning the second stateful expression in the element via GFP_ATOMIC\nfails, then the first stateful expression remains in place without being\nreleased.\n\n \u00a0 unreferenced object (percpu) 0x607b97e9cab8 (size 16):\n \u00a0 \u00a0 comm \"softirq\", pid 0, jiffies 4294931867\n \u00a0 \u00a0 hex dump (first 16 bytes on cpu 3):\n \u00a0 \u00a0 \u00a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u00a0 \u00a0 backtrace (crc 0):\n \u00a0 \u00a0 \u00a0 pcpu_alloc_noprof+0x453/0xd80\n \u00a0 \u00a0 \u00a0 nft_counter_clone+0x9c/0x190 [nf_tables]\n \u00a0 \u00a0 \u00a0 nft_expr_clone+0x8f/0x1b0 [nf_tables]\n \u00a0 \u00a0 \u00a0 nft_dynset_new+0x2cb/0x5f0 [nf_tables]\n \u00a0 \u00a0 \u00a0 nft_rhash_update+0x236/0x11c0 [nf_tables]\n \u00a0 \u00a0 \u00a0 nft_dynset_eval+0x11f/0x670 [nf_tables]\n \u00a0 \u00a0 \u00a0 nft_do_chain+0x253/0x1700 [nf_tables]\n \u00a0 \u00a0 \u00a0 nft_do_chain_ipv4+0x18d/0x270 [nf_tables]\n \u00a0 \u00a0 \u00a0 nf_hook_slow+0xaa/0x1e0\n \u00a0 \u00a0 \u00a0 ip_local_deliver+0x209/0x330",
  "id": "GHSA-vfh6-r892-92wv",
  "modified": "2026-09-08T09:35:27Z",
  "published": "2026-03-28T09:31:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23399"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0548a13b5a145b16e4da0628b5936baf35f51b43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31641c682db73353e4647e40735c7f2a75ff58ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4357dbb1d9c35ca0b4443d71c98a48e6666f7689"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c88a9fd26cee365bec932196f76175772a941cca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1354873cbe3b344899c4311ac05897fd83e3f21"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6661add2d9c6913e1dad97336595e23a2bed195"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb7bf413e59945df03d4567b73ce464eebe2f4ea"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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