{
  "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-2026-23243",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23243",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-18T10:05:05.826Z",
    "updatedAt": "2026-10-19T18:35:40.101Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "RDMA/umad: Reject negative data_len in ib_umad_write",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umad: Reject negative data_len in ib_umad_write\n\nib_umad_write computes data_len from user-controlled count and the\nMAD header sizes. With a mismatched user MAD header size and RMPP\nheader length, data_len can become negative and reach ib_create_send_mad().\nThis can make the padding calculation exceed the segment size and trigger\nan out-of-bounds memset in alloc_send_rmpp_list().\n\nAdd an explicit check to reject negative data_len before creating the\nsend buffer.\n\nKASAN splat:\n[  211.363464] BUG: KASAN: slab-out-of-bounds in ib_create_send_mad+0xa01/0x11b0\n[  211.364077] Write of size 220 at addr ffff88800c3fa1f8 by task spray_thread/102\n[  211.365867] ib_create_send_mad+0xa01/0x11b0\n[  211.365887] ib_umad_write+0x853/0x1c80",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1371ef6b1ecf3676b8942f5dfb3634fb0648128e"
            },
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "362e45fd9069ffa1523f9f1633b606ebf72060d7"
            },
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6eb2919474ca105c5b13d19574e25f0ddcf19ca2"
            },
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d"
            },
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9c80d688f402539dfc8f336de1380d6b4ee14316"
            },
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "205955f29c26330b1dc7fdeadd5bb97c38e26f56"
            },
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b"
            },
            {
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5551b02fdbfd85a325bb857f3a8f9c9f33397ed2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.24",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.24"
            },
            {
              "version": "5.10.252",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.202",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.165",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.128",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.75",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}