CVE-2026-23243 (GCVE-0-2026-23243)

Vulnerability from cvelistv5 – Published: 2026-03-18 10:05 – Updated: 2026-06-17 17:47
VLAI
Title
RDMA/umad: Reject negative data_len in ib_umad_write
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/umad: Reject negative data_len in ib_umad_write ib_umad_write computes data_len from user-controlled count and the MAD header sizes. With a mismatched user MAD header size and RMPP header length, data_len can become negative and reach ib_create_send_mad(). This can make the padding calculation exceed the segment size and trigger an out-of-bounds memset in alloc_send_rmpp_list(). Add an explicit check to reject negative data_len before creating the send buffer. KASAN splat: [ 211.363464] BUG: KASAN: slab-out-of-bounds in ib_create_send_mad+0xa01/0x11b0 [ 211.364077] Write of size 220 at addr ffff88800c3fa1f8 by task spray_thread/102 [ 211.365867] ib_create_send_mad+0xa01/0x11b0 [ 211.365887] ib_umad_write+0x853/0x1c80
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < 1371ef6b1ecf3676b8942f5dfb3634fb0648128e (git)
Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < 362e45fd9069ffa1523f9f1633b606ebf72060d7 (git)
Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < 6eb2919474ca105c5b13d19574e25f0ddcf19ca2 (git)
Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d (git)
Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < 9c80d688f402539dfc8f336de1380d6b4ee14316 (git)
Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < 205955f29c26330b1dc7fdeadd5bb97c38e26f56 (git)
Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < 52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b (git)
Affected: 2be8e3ee8efd6f99ce454115c29d09750915021a , < 5551b02fdbfd85a325bb857f3a8f9c9f33397ed2 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.24
Unaffected: 0 , < 2.6.24 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23243",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-17T17:47:24.163717Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-17T17:47:33.620Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/user_mad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1371ef6b1ecf3676b8942f5dfb3634fb0648128e",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            },
            {
              "lessThan": "362e45fd9069ffa1523f9f1633b606ebf72060d7",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            },
            {
              "lessThan": "6eb2919474ca105c5b13d19574e25f0ddcf19ca2",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            },
            {
              "lessThan": "a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            },
            {
              "lessThan": "9c80d688f402539dfc8f336de1380d6b4ee14316",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            },
            {
              "lessThan": "205955f29c26330b1dc7fdeadd5bb97c38e26f56",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            },
            {
              "lessThan": "52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            },
            {
              "lessThan": "5551b02fdbfd85a325bb857f3a8f9c9f33397ed2",
              "status": "affected",
              "version": "2be8e3ee8efd6f99ce454115c29d09750915021a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/user_mad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.24"
            },
            {
              "lessThan": "2.6.24",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.252",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "2.6.24",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:03:05.550Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1371ef6b1ecf3676b8942f5dfb3634fb0648128e"
        },
        {
          "url": "https://git.kernel.org/stable/c/362e45fd9069ffa1523f9f1633b606ebf72060d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/6eb2919474ca105c5b13d19574e25f0ddcf19ca2"
        },
        {
          "url": "https://git.kernel.org/stable/c/a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c80d688f402539dfc8f336de1380d6b4ee14316"
        },
        {
          "url": "https://git.kernel.org/stable/c/205955f29c26330b1dc7fdeadd5bb97c38e26f56"
        },
        {
          "url": "https://git.kernel.org/stable/c/52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b"
        },
        {
          "url": "https://git.kernel.org/stable/c/5551b02fdbfd85a325bb857f3a8f9c9f33397ed2"
        }
      ],
      "title": "RDMA/umad: Reject negative data_len in ib_umad_write",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23243",
    "datePublished": "2026-03-18T10:05:05.826Z",
    "dateReserved": "2026-01-13T15:37:45.989Z",
    "dateUpdated": "2026-06-17T17:47:33.620Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23243",
      "date": "2026-06-21",
      "epss": "0.00125",
      "percentile": "0.02522"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23243\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-18T11:16:16.090\",\"lastModified\":\"2026-05-21T15:52:23.883\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nRDMA/umad: Rechazar data_len negativo en ib_umad_write\\n\\nib_umad_write calcula data_len a partir de un conteo controlado por el usuario y los tama\u00f1os de encabezado MAD. Con un tama\u00f1o de encabezado MAD de usuario no coincidente y una longitud de encabezado RMPP, data_len puede volverse negativo y alcanzar ib_create_send_mad(). Esto puede hacer que el c\u00e1lculo de relleno exceda el tama\u00f1o del segmento y desencadenar un memset fuera de l\u00edmites en alloc_send_rmpp_list().\\n\\nSe a\u00f1ade una verificaci\u00f3n expl\u00edcita para rechazar data_len negativo antes de crear el b\u00fafer de env\u00edo.\\n\\nKASAN splat:\\n[ 211.363464] ERROR: KASAN: slab-out-of-bounds en ib_create_send_mad+0xa01/0x11b0\\n[ 211.364077] Escritura de tama\u00f1o 220 en la direcci\u00f3n ffff88800c3fa1f8 por la tarea spray_thread/102\\n[ 211.365867] ib_create_send_mad+0xa01/0x11b0\\n[ 211.365887] ib_umad_write+0x853/0x1c80\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.24.1\",\"versionEndExcluding\":\"5.10.252\",\"matchCriteriaId\":\"2373214A-3D90-42DB-82C4-E1879374793C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.202\",\"matchCriteriaId\":\"4002FC2B-1456-4666-B240-0EBF590C4671\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.165\",\"matchCriteriaId\":\"797C7F46-D0BE-4FB8-A502-C5EF8E6B6654\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.128\",\"matchCriteriaId\":\"851E9353-6C09-4CC9-877E-E09DB164A3C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.75\",\"matchCriteriaId\":\"BCE16369-98ED-41CF-8995-DFDC10B288D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.14\",\"matchCriteriaId\":\"BF463CB7-1F58-4607-B847-77ED23E4B9B7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.4\",\"matchCriteriaId\":\"672A3E79-EC03-479D-8503-361DFBDC8092\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:2.6.24:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"6F3E61F3-1CF1-4176-94CD-89A408BCFC96\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1371ef6b1ecf3676b8942f5dfb3634fb0648128e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/205955f29c26330b1dc7fdeadd5bb97c38e26f56\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/362e45fd9069ffa1523f9f1633b606ebf72060d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5551b02fdbfd85a325bb857f3a8f9c9f33397ed2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6eb2919474ca105c5b13d19574e25f0ddcf19ca2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9c80d688f402539dfc8f336de1380d6b4ee14316\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-23243\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-17T17:47:24.163717Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-17T17:47:29.147Z\"}}], \"cna\": {\"title\": \"RDMA/umad: Reject negative data_len in ib_umad_write\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"1371ef6b1ecf3676b8942f5dfb3634fb0648128e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"362e45fd9069ffa1523f9f1633b606ebf72060d7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"6eb2919474ca105c5b13d19574e25f0ddcf19ca2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"9c80d688f402539dfc8f336de1380d6b4ee14316\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"205955f29c26330b1dc7fdeadd5bb97c38e26f56\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2be8e3ee8efd6f99ce454115c29d09750915021a\", \"lessThan\": \"5551b02fdbfd85a325bb857f3a8f9c9f33397ed2\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/infiniband/core/user_mad.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.24\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.24\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.252\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.202\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.165\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.128\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.75\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.14\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.19.*\"}, {\"status\": \"unaffected\", \"version\": \"7.0\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/infiniband/core/user_mad.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1371ef6b1ecf3676b8942f5dfb3634fb0648128e\"}, {\"url\": \"https://git.kernel.org/stable/c/362e45fd9069ffa1523f9f1633b606ebf72060d7\"}, {\"url\": \"https://git.kernel.org/stable/c/6eb2919474ca105c5b13d19574e25f0ddcf19ca2\"}, {\"url\": \"https://git.kernel.org/stable/c/a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d\"}, {\"url\": \"https://git.kernel.org/stable/c/9c80d688f402539dfc8f336de1380d6b4ee14316\"}, {\"url\": \"https://git.kernel.org/stable/c/205955f29c26330b1dc7fdeadd5bb97c38e26f56\"}, {\"url\": \"https://git.kernel.org/stable/c/52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b\"}, {\"url\": \"https://git.kernel.org/stable/c/5551b02fdbfd85a325bb857f3a8f9c9f33397ed2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.252\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.202\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.165\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.128\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.75\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.14\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19.4\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0\", \"versionStartIncluding\": \"2.6.24\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T22:03:05.550Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-23243\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-17T17:47:33.620Z\", \"dateReserved\": \"2026-01-13T15:37:45.989Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-03-18T10:05:05.826Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.