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CVE-2023-4015

Status: ModifiedHigh (7.8)—

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.

On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.

We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Debian — Debian LinuxLinux — Linux Kernel

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2023-4015",
  "cveTags": [],
  "metrics": {
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        "source": "cve-coordination@google.com",
        "cvssData": {
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          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 1.8
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  "affected": [
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          "vendor": "Linux",
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          "packageName": "kernel",
          "defaultStatus": "unaffected"
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  "published": "2023-09-06T14:15:11.093",
  "references": [
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      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2",
      "tags": [
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        "Mailing List",
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        "Vendor Advisory"
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      "source": "cve-coordination@google.com"
    },
    {
      "url": "https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2",
      "tags": [
        "Patch",
        "Vendor Advisory"
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      "source": "cve-coordination@google.com"
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    {
      "url": "https://www.debian.org/security/2023/dsa-5492",
      "tags": [
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      "source": "cve-coordination@google.com"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-416"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
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  ],
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    {
      "lang": "en",
      "value": "A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nOn an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.\n\nWe recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de use-after-free en el netfilter del kernel de Linux: nf_tables componente puede ser explotado para lograr la escalada de privilegios locales. En un error al crear una regla nftables, desactivar expresiones inmediatas en nft_immediate_deactivate() puede llevar a desenlazar la cadena y los objetos se desactiven pero se usen más tarde. Recomendamos actualizar al commit anterior 0a771f7b266b02d262900c75f1e175c7fe76fec2."
    }
  ],
  "lastModified": "2026-06-17T06:36:55.030",
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