{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-53223",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53223",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-25T08:39:24.588Z",
    "updatedAt": "2026-10-19T19:57:29.682Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net: guard timestamp cmsgs to real error queue skbs",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: guard timestamp cmsgs to real error queue skbs\n\nskb_is_err_queue() treats PACKET_OUTGOING as the sole marker for an skb\nfrom sk_error_queue. That assumption is not true for AF_PACKET sockets:\noutgoing packet taps are also delivered to packet sockets with\nskb->pkt_type == PACKET_OUTGOING, but their skb->cb is owned by AF_PACKET\ninstead of struct sock_exterr_skb.\n\nIf such an skb is received with timestamping enabled, the generic\ntimestamp cmsg path can read AF_PACKET control-buffer state as\nsock_exterr_skb::opt_stats. With SO_RXQ_OVFL enabled, the packet drop\ncounter overlaps opt_stats. An odd drop count makes the path emit\nSCM_TIMESTAMPING_OPT_STATS with skb->len and skb->data. For non-linear\nskbs this copies past the linear head and can trigger hardened usercopy or\ndisclose adjacent heap contents.\n\nKeep skb_is_err_queue() local to net/socket.c, but make it verify that\nthe PACKET_OUTGOING marker is paired with the sock_rmem_free destructor\ninstalled by sock_queue_err_skb(). AF_PACKET receive skbs use normal\nreceive ownership and no longer pass as error-queue skbs, while legitimate\nsk_error_queue entries keep the PACKET_OUTGOING marker and sock_rmem_free\nownership.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "24a0d548d3a765cd4558224e4f8e06e14cba26e3"
            },
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "71ff5cdd5da61d0438e902aa0fd68c28bc901abe"
            },
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ad9a0374ee6d11048e1f74cd5180bad58b9848b4"
            },
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b903e9b5629ec8dd6db92174070045bf81ad7060"
            },
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e0665b2a8e90bb08bd205062c75662b502d31797"
            },
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3dde4fb941fa5649ab809f6cd3e20e0c424a4e31"
            },
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eb51a9ad3ceb01bc6c0fb608dbc856e03ee6f24a"
            },
            {
              "version": "8605330aac5a5785630aec8f64378a54891937cc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1ee90b77b727df903033db873c75caac5c27ec98"
            },
            {
              "version": "cdaf15b43bd31003220cb080bcbbd57787a2fca9",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.10.14",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.11"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.11"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.94",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.36",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}