tcp: check skb is non-NULL in tcp_rto_delta_us()

{
  "id": "64824c6412d5c90c47402548181ad29ccad9abb7f57cf1399076c511ee9749da",
  "url": "https://osv.dev/vulnerability/CVE-2024-47684",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "tcp: check skb is non-NULL in tcp_rto_delta_us()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: tcp: check skb is non-NULL in tcp_rto_delta_us() We have some machines running stock Ubuntu 20.04.6 which is their 5.4.0-174-generic kernel that are running ceph and recently hit a null ptr dereference in tcp_rearm_rto(). Initially hitting it from the TLP path, but then later we also saw it getting hit from the RACK case as well. Here are examples of the oops messages we saw in each of those cases: Jul 26 15:05:02 rx [11061395.780353] BUG: kernel NULL pointer dereference, address: 0000000000000020 Jul 26 15:05:02 rx [11061395.787572] #PF: supervisor read access in kernel mode Jul 26 15:05:02 rx [11061395.792971] #PF: error_code(0x0000) - not-present page Jul 26 15:05:02 rx [11061395.798362] PGD 0 P4D 0 Jul 26 15:05:02 rx [11061395.801164] Oops: 0000 [#1] SMP NOPTI Jul 26 15:05:02 rx [11061395.805091] CPU: 0 PID: 9180 Comm: msgr-worker-1 Tainted: G W 5.4.0-174-generic #193-Ubuntu Jul 26 15:05:02 rx [11061395.814996] Hardware name: Supermicro SMC 2x26 os-gen8 64C NVME-Y 256G/H12SSW-NTR, BIOS 2.5.V1.2U.NVMe.UEFI 05/09/2023 Jul 26 15:05:02 rx [11061395.825952] RIP: 0010:tcp_rearm_rto+0xe4/0x160 Jul 26 15:05:02 rx [11061395.830656] Code: 87 ca 04 00 00 00 5b 41 5c 41 5d 5d c3 c3 49 8b bc 24 40 06 00 00 eb 8d 48 bb cf f7 53 e3 a5 9b c4 20 4c 89 ef e8 0c fe 0e 00 <48> 8b 78 20 48 c1 ef 03 48 89 f8 41 8b bc 24 80 04 00 00 48 f7 e3 Jul 26 15:05:02 rx [11061395.849665] RSP: 0018:ffffb75d40003e08 EFLAGS: 00010246 Jul 26",
    "evidence": "osv:CVE-2024-47684",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.19.323",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.285",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.227",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.168",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.113",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.54",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.13",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-47684",
      "aliases": [
        "CVE-2024-47684"
      ],
      "affected": [
        {
          "ranges": [
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              "type": "GIT",
              "events": [
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                {
                  "fixed": "16e0387d87fc858e34449fdf2b14ed5837f761db"
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                {
                  "fixed": "ec31cf42fc4e35bb1248ce6eb1de6de9f851ac86"
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                {
                  "fixed": "5c4c03288a4aea705e36aa44119c13d7ee4dce99"
                },
                {
                  "fixed": "96c4983eab2a5da235f7fff90beaf17b008ba029"
                },
                {
                  "fixed": "570f7d8c9bf14f041152ba8353d4330ef7575915"
                },
                {
                  "fixed": "81d18c152e3f82bacadf83bc0a471b2363b9cc18"
                },
                {
                  "fixed": "09aea49fbc7e755a915c405644f347137cdb62b0"
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                {
                  "fixed": "c8770db2d54437a5f49417ae7b46f7de23d14db6"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3.10.108"
                },
                {
                  "fixed": "3.11"
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              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "42a858e036bb26cb559157393b7890cabe70bfc2"
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            }
          ],
          "versions": [
            "v3.10.108"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-47684.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.13.0"
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              ]
            },
            {
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                  "introduced": "4.20.0"
                },
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              ]
            },
            {
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                {
                  "introduced": "5.5.0"
                },
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              ]
            },
            {
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                  "introduced": "5.11.0"
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                  "introduced": "5.16.0"
                },
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              ]
            },
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                  "introduced": "6.2.0"
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                  "introduced": "6.7.0"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-47684.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.737724614Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-355557.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
        "https://git.kernel.org/stable/c/09aea49fbc7e755a915c405644f347137cdb62b0",
        "https://git.kernel.org/stable/c/16e0387d87fc858e34449fdf2b14ed5837f761db",
        "https://git.kernel.org/stable/c/570f7d8c9bf14f041152ba8353d4330ef7575915",
        "https://git.kernel.org/stable/c/5c4c03288a4aea705e36aa44119c13d7ee4dce99",
        "https://git.kernel.org/stable/c/81d18c152e3f82bacadf83bc0a471b2363b9cc18",
        "https://git.kernel.org/stable/c/96c4983eab2a5da235f7fff90beaf17b008ba029",
        "https://git.kernel.org/stable/c/ad4f0a14d6856e68f023fc4e5017cfd881a3dfbc",
        "https://git.kernel.org/stable/c/c8770db2d54437a5f49417ae7b46f7de23d14db6",
        "https://git.kernel.org/stable/c/ec31cf42fc4e35bb1248ce6eb1de6de9f851ac86",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/47xxx/CVE-2024-47684.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-47684",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/47xxx/CVE-2024-47684.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-47684",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 489842,
  "published_at": "2024-10-21T11:53:25.787+00:00"
}