CVE-2024-58239 (GCVE-0-2024-58239)
Vulnerability from cvelistv5
Published
2025-08-22 13:01
Modified
2026-08-05 11:47
Severity ?
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: tls: stop recv() if initial process_rx_list gave us non-DATA If we have a non-DATA record on the rx_list and another record of the same type still on the queue, we will end up merging them: - process_rx_list copies the non-DATA record - we start the loop and process the first available record since it's of the same type - we break out of the loop since the record was not DATA Just check the record type and jump to the end in case process_rx_list did some work.
References
Impacted products
Vendor Product Version
Linux Linux Version: 692d7b5d1f9125a1cf0595e979e3b5fb7210547e
Version: 692d7b5d1f9125a1cf0595e979e3b5fb7210547e
Version: 692d7b5d1f9125a1cf0595e979e3b5fb7210547e
Version: 692d7b5d1f9125a1cf0595e979e3b5fb7210547e
Version: 692d7b5d1f9125a1cf0595e979e3b5fb7210547e
Version: 692d7b5d1f9125a1cf0595e979e3b5fb7210547e
Version: 692d7b5d1f9125a1cf0595e979e3b5fb7210547e
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/tls/tls_sw.c"
          ],
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        },
        {
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "version": "5.10.211",
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            },
            {
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              "status": "unaffected",
              "version": "5.15.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.270",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.211",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: stop recv() if initial process_rx_list gave us non-DATA\n\nIf we have a non-DATA record on the rx_list and another record of the\nsame type still on the queue, we will end up merging them:\n - process_rx_list copies the non-DATA record\n - we start the loop and process the first available record since it\u0027s\n   of the same type\n - we break out of the loop since the record was not DATA\n\nJust check the record type and jump to the end in case process_rx_list\ndid some work."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The bug lives in net/tls (kTLS) receive processing and is driven entirely by the sequence and types of TLS records a remote peer transmits over the network. Any kTLS-enabled endpoint (OpenSSL/nginx offload, NVMe-TCP target, NFS/RPC-with-TLS, tlshd-provisioned sockets) is reachable from the network.\nAC:L - The attacker simply sends two same-type non-DATA records back-to-back, and can force the required \"leftover record on rx_list\" precondition by making the first control record larger than the reader\u0027s buffer (partially_consumed \u2192 put_on_rx_list). There is no race, no memory-layout dependency, and no timing window to win.\nPR:N - The attacker only needs to be the TLS peer on an established session; on a public kTLS server the handshake is server-authenticated only, so any anonymous client can complete it and then emit arbitrary post-handshake alert/handshake records. No privileges or accounts on the target host are required.\nUI:N - The vulnerable path is the target\u0027s ordinary recvmsg() server loop; no victim action beyond normal socket reads is needed. The remote peer triggers it purely by its own record transmission pattern.\nS:U - The consequences are confined to the affected socket and the kernel/process security authority that owns it. No VM, IOMMU, or sandbox boundary is crossed.\nC:N - Only the attacker\u0027s own decrypted record payload is delivered to the consumer; all copies remain bounded by the caller-supplied len, so no kernel memory, uninitialized data, or other-session content is exposed.\nI:L - A remote peer can make the kernel coalesce two distinct TLS control records into one recvmsg() under a single TLS_GET_RECORD_TYPE cmsg with no intervening record boundary, corrupting the protocol message stream handed to the consumer \u2014 e.g. tls_alert_recv() parses only the first two bytes, letting a fatal alert be hidden behind a preceding warning alert. The modification is real but limited to attacker-supplied control-message framing, not arbitrary data or control-flow.\nA:H - With MSG_WAITALL, target is derived from the full requested length before len -= copied, so after process_rx_list returns a complete control record the loop re-enters tls_rx_rec_wait() and blocks indefinitely (default SO_RCVTIMEO of 0) instead of returning the record. The wedged reader holds ctx-\u003ereader_present, so every other thread reading that socket also stalls in tls_rx_reader_acquire(), and a remote peer can repeat this across connections to hang service threads."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:47:49.124Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f310143961e2d9a0479fca117ce869f8aaecc140"
        },
        {
          "url": "https://git.kernel.org/stable/c/31e10d6cb0c9532ff070cf50da1657c3acee9276"
        },
        {
          "url": "https://git.kernel.org/stable/c/4338032aa90bd1d5b33a4274e8fa8347cda5ee09"
        },
        {
          "url": "https://git.kernel.org/stable/c/6756168add1c6c3ef1c32c335bb843a5d1f99a75"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b952d8fdfcf6fd8ea0b8954bc9277642cf0977f"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4ed943882a8fc057ea5a67643314245e048bbdd"
        },
        {
          "url": "https://git.kernel.org/stable/c/fdfbaec5923d9359698cbb286bc0deadbb717504"
        }
      ],
      "title": "tls: stop recv() if initial process_rx_list gave us non-DATA",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-58239",
    "datePublished": "2025-08-22T13:01:17.440Z",
    "dateReserved": "2025-04-16T07:19:43.804Z",
    "dateUpdated": "2026-08-05T11:47:49.124Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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