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

Vulnerability from cvelistv5 – Published: 2026-03-28 07:16 – Updated: 2026-09-08 08:46
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 563125a73ac30d7036ae69ca35c40500562c1de4 , < eb7bf413e59945df03d4567b73ce464eebe2f4ea (git)
Affected: 563125a73ac30d7036ae69ca35c40500562c1de4 , < 4357dbb1d9c35ca0b4443d71c98a48e6666f7689 (git)
Affected: 563125a73ac30d7036ae69ca35c40500562c1de4 , < e6661add2d9c6913e1dad97336595e23a2bed195 (git)
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: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (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 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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      "date": "2026-09-16",
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      "percentile": "0.02201"
    },
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      "cve": "CVE-2026-23399",
      "id": "msrc_CVE-2026-23399",
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      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-23399.json",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23399\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-28T08:15:56.720\",\"lastModified\":\"2026-09-08T09:17:49.613\",\"vulnStatus\":\"Modified\",\"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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nnf_tables: nft_dynset: corregir posible fuga de memoria de expresi\u00f3n con estado en la ruta de error\\n\\nSi la clonaci\u00f3n de la segunda expresi\u00f3n con estado en el elemento a trav\u00e9s de GFP_ATOMIC falla, entonces la primera expresi\u00f3n con estado permanece en su lugar sin ser liberada.\\n\\n \u0026#xa0; objeto sin referencia (por CPU) 0x607b97e9cab8 (tama\u00f1o 16):\\n \u0026#xa0; \u0026#xa0; comm \u0027softirq\u0027, pid 0, jiffies 4294931867\\n \u0026#xa0; \u0026#xa0; volcado hexadecimal (primeros 16 bytes en la CPU 3):\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\\n \u0026#xa0; \u0026#xa0; rastreo de pila (crc 0):\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; pcpu_alloc_noprof+0x453/0xd80\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nft_counter_clone+0x9c/0x190 [nf_tables]\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nft_expr_clone+0x8f/0x1b0 [nf_tables]\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nft_dynset_new+0x2cb/0x5f0 [nf_tables]\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nft_rhash_update+0x236/0x11c0 [nf_tables]\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nft_dynset_eval+0x11f/0x670 [nf_tables]\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nft_do_chain+0x253/0x1700 [nf_tables]\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nft_do_chain_ipv4+0x18d/0x270 [nf_tables]\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; nf_hook_slow+0xaa/0x1e0\\n \u0026#xa0; \u0026#xa0; \u0026#xa0; ip_local_deliver+0x209/0x330\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"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\",\"versions\":[{\"version\":\"563125a73ac30d7036ae69ca35c40500562c1de4\",\"lessThan\":\"eb7bf413e59945df03d4567b73ce464eebe2f4ea\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"563125a73ac30d7036ae69ca35c40500562c1de4\",\"lessThan\":\"4357dbb1d9c35ca0b4443d71c98a48e6666f7689\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"563125a73ac30d7036ae69ca35c40500562c1de4\",\"lessThan\":\"e6661add2d9c6913e1dad97336595e23a2bed195\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"563125a73ac30d7036ae69ca35c40500562c1de4\",\"lessThan\":\"d1354873cbe3b344899c4311ac05897fd83e3f21\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"563125a73ac30d7036ae69ca35c40500562c1de4\",\"lessThan\":\"31641c682db73353e4647e40735c7f2a75ff58ef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"563125a73ac30d7036ae69ca35c40500562c1de4\",\"lessThan\":\"c88a9fd26cee365bec932196f76175772a941cca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"563125a73ac30d7036ae69ca35c40500562c1de4\",\"lessThan\":\"0548a13b5a145b16e4da0628b5936baf35f51b43\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"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\",\"versions\":[{\"version\":\"5.11\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.136\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.78\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.20\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.10\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11.1\",\"versionEndExcluding\":\"6.12.78\",\"matchCriteriaId\":\"0618528B-8039-4E87-8695-397AE7D4B4E5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.20\",\"matchCriteriaId\":\"E5571059-6552-48E7-9BEF-3E358C387171\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.10\",\"matchCriteriaId\":\"96D34333-38BE-4414-9E79-6EB764329581\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.11:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"7AD3510E-E8FA-47F3-9AD5-D8EA4A2719D1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"F253B622-8837-4245-BCE5-A7BF8FC76A16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F666C8D8-6538-46D4-B318-87610DE64C34\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"02259FDA-961B-47BC-AE7F-93D7EC6E90C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"1D2315C0-D46F-4F85-9754-F9E5E11374A6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"512EE3A8-A590-4501-9A94-5D4B268D6138\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0548a13b5a145b16e4da0628b5936baf35f51b43\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/31641c682db73353e4647e40735c7f2a75ff58ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4357dbb1d9c35ca0b4443d71c98a48e6666f7689\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c88a9fd26cee365bec932196f76175772a941cca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d1354873cbe3b344899c4311ac05897fd83e3f21\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e6661add2d9c6913e1dad97336595e23a2bed195\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb7bf413e59945df03d4567b73ce464eebe2f4ea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:20:44+00:00",
      "cve": "CVE-2026-23399",
      "id": "CVE-2026-23399",
      "initial_release_date": "2026-03-28T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nf_tables: nft_dynset: fix possible stateful expression memleak in error path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23399.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:36:26Z",
      "cve": "CVE-2026-23399",
      "id": "CVE-2026-23399",
      "initial_release_date": "2026-03-28T18:19:40Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "159",
      "product_status:known_not_affected": "208",
      "product_status:recommended": "280",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23399",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23399.json",
      "version": "20"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.