CVE-2026-23399 (GCVE-0-2026-23399)

Vulnerability from cvelistv5 – Published: 2026-03-28 07:16 – Updated: 2026-03-28 07:16
VLAI?
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 563125a73ac30d7036ae69ca35c40500562c1de4 , < d1354873cbe3b344899c4311ac05897fd83e3f21 (git)
Affected: 563125a73ac30d7036ae69ca35c40500562c1de4 , < 31641c682db73353e4647e40735c7f2a75ff58ef (git)
Affected: 563125a73ac30d7036ae69ca35c40500562c1de4 , < c88a9fd26cee365bec932196f76175772a941cca (git)
Affected: 563125a73ac30d7036ae69ca35c40500562c1de4 , < 0548a13b5a145b16e4da0628b5936baf35f51b43 (git)
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    Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc5 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/netfilter/nf_tables.h",
            "net/netfilter/nf_tables_api.c",
            "net/netfilter/nft_dynset.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "d1354873cbe3b344899c4311ac05897fd83e3f21",
              "status": "affected",
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              "versionType": "git"
            },
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              "versionType": "git"
            }
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/netfilter/nf_tables.h",
            "net/netfilter/nf_tables_api.c",
            "net/netfilter/nft_dynset.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.11"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0-rc5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.78",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.20",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.10",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0-rc5",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-28T07:16:09.888Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d1354873cbe3b344899c4311ac05897fd83e3f21"
        },
        {
          "url": "https://git.kernel.org/stable/c/31641c682db73353e4647e40735c7f2a75ff58ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/c88a9fd26cee365bec932196f76175772a941cca"
        },
        {
          "url": "https://git.kernel.org/stable/c/0548a13b5a145b16e4da0628b5936baf35f51b43"
        }
      ],
      "title": "nf_tables: nft_dynset: fix possible stateful expression memleak in error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23399",
    "datePublished": "2026-03-28T07:16:09.888Z",
    "dateReserved": "2026-01-13T15:37:46.012Z",
    "dateUpdated": "2026-03-28T07:16:09.888Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23399\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-28T08:15:56.720\",\"lastModified\":\"2026-03-30T13:26:07.647\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0548a13b5a145b16e4da0628b5936baf35f51b43\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/31641c682db73353e4647e40735c7f2a75ff58ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c88a9fd26cee365bec932196f76175772a941cca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d1354873cbe3b344899c4311ac05897fd83e3f21\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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