CVE-2022-49198 (GCVE-0-2022-49198)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2025-05-04 08:32
VLAI?
Title
mptcp: Fix crash due to tcp_tsorted_anchor was initialized before release skb
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix crash due to tcp_tsorted_anchor was initialized before release skb Got crash when doing pressure test of mptcp: =========================================================================== dst_release: dst:ffffa06ce6e5c058 refcnt:-1 kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle kernel paging request at ffffa06ce6e5c058 PGD 190a01067 P4D 190a01067 PUD 43fffb067 PMD 22e403063 PTE 8000000226e5c063 Oops: 0011 [#1] SMP PTI CPU: 7 PID: 7823 Comm: kworker/7:0 Kdump: loaded Tainted: G E Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.2.1 04/01/2014 Call Trace: ? skb_release_head_state+0x68/0x100 ? skb_release_all+0xe/0x30 ? kfree_skb+0x32/0xa0 ? mptcp_sendmsg_frag+0x57e/0x750 ? __mptcp_retrans+0x21b/0x3c0 ? __switch_to_asm+0x35/0x70 ? mptcp_worker+0x25e/0x320 ? process_one_work+0x1a7/0x360 ? worker_thread+0x30/0x390 ? create_worker+0x1a0/0x1a0 ? kthread+0x112/0x130 ? kthread_flush_work_fn+0x10/0x10 ? ret_from_fork+0x35/0x40 =========================================================================== In __mptcp_alloc_tx_skb skb was allocated and skb->tcp_tsorted_anchor will be initialized, in under memory pressure situation sk_wmem_schedule will return false and then kfree_skb. In this case skb->_skb_refdst is not null because_skb_refdst and tcp_tsorted_anchor are stored in the same mem, and kfree_skb will try to release dst and cause crash.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 289f2f58266777f45a52cd55dea96d736e6244c9 , < af61a8f7603926c26158153d0a0755764d82657c (git)
Affected: f70cad1085d1e01d3ec73c1078405f906237feee , < 752add6f5ce5305e55d8bda4ac8d69be3a09f14d (git)
Affected: f70cad1085d1e01d3ec73c1078405f906237feee , < 4d54181eba4b077fb74033a7186898ad4000a7a5 (git)
Affected: f70cad1085d1e01d3ec73c1078405f906237feee , < 3ef3905aa3b5b3e222ee6eb0210bfd999417a8cc (git)
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    Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 5.16.19 , ≤ 5.16.* (semver)
Unaffected: 5.17.2 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/protocol.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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            }
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/protocol.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.16"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.19",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.17.2",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: Fix crash due to tcp_tsorted_anchor was initialized before release skb\n\nGot crash when doing pressure test of mptcp:\n\n===========================================================================\ndst_release: dst:ffffa06ce6e5c058 refcnt:-1\nkernel tried to execute NX-protected page - exploit attempt? (uid: 0)\nBUG: unable to handle kernel paging request at ffffa06ce6e5c058\nPGD 190a01067 P4D 190a01067 PUD 43fffb067 PMD 22e403063 PTE 8000000226e5c063\nOops: 0011 [#1] SMP PTI\nCPU: 7 PID: 7823 Comm: kworker/7:0 Kdump: loaded Tainted: G            E\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.2.1 04/01/2014\nCall Trace:\n ? skb_release_head_state+0x68/0x100\n ? skb_release_all+0xe/0x30\n ? kfree_skb+0x32/0xa0\n ? mptcp_sendmsg_frag+0x57e/0x750\n ? __mptcp_retrans+0x21b/0x3c0\n ? __switch_to_asm+0x35/0x70\n ? mptcp_worker+0x25e/0x320\n ? process_one_work+0x1a7/0x360\n ? worker_thread+0x30/0x390\n ? create_worker+0x1a0/0x1a0\n ? kthread+0x112/0x130\n ? kthread_flush_work_fn+0x10/0x10\n ? ret_from_fork+0x35/0x40\n===========================================================================\n\nIn __mptcp_alloc_tx_skb skb was allocated and skb-\u003etcp_tsorted_anchor will\nbe initialized, in under memory pressure situation sk_wmem_schedule will\nreturn false and then kfree_skb. In this case skb-\u003e_skb_refdst is not null\nbecause_skb_refdst and tcp_tsorted_anchor are stored in the same mem, and\nkfree_skb will try to release dst and cause crash."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:32:10.900Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/af61a8f7603926c26158153d0a0755764d82657c"
        },
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          "url": "https://git.kernel.org/stable/c/752add6f5ce5305e55d8bda4ac8d69be3a09f14d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d54181eba4b077fb74033a7186898ad4000a7a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ef3905aa3b5b3e222ee6eb0210bfd999417a8cc"
        }
      ],
      "title": "mptcp: Fix crash due to tcp_tsorted_anchor was initialized before release skb",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49198",
    "datePublished": "2025-02-26T01:55:41.631Z",
    "dateReserved": "2025-02-26T01:49:39.291Z",
    "dateUpdated": "2025-05-04T08:32:10.900Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49198\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:00:56.880\",\"lastModified\":\"2025-09-23T13:50:52.883\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: Fix crash due to tcp_tsorted_anchor was initialized before release skb\\n\\nGot crash when doing pressure test of mptcp:\\n\\n===========================================================================\\ndst_release: dst:ffffa06ce6e5c058 refcnt:-1\\nkernel tried to execute NX-protected page - exploit attempt? (uid: 0)\\nBUG: unable to handle kernel paging request at ffffa06ce6e5c058\\nPGD 190a01067 P4D 190a01067 PUD 43fffb067 PMD 22e403063 PTE 8000000226e5c063\\nOops: 0011 [#1] SMP PTI\\nCPU: 7 PID: 7823 Comm: kworker/7:0 Kdump: loaded Tainted: G            E\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.2.1 04/01/2014\\nCall Trace:\\n ? skb_release_head_state+0x68/0x100\\n ? skb_release_all+0xe/0x30\\n ? kfree_skb+0x32/0xa0\\n ? mptcp_sendmsg_frag+0x57e/0x750\\n ? __mptcp_retrans+0x21b/0x3c0\\n ? __switch_to_asm+0x35/0x70\\n ? mptcp_worker+0x25e/0x320\\n ? process_one_work+0x1a7/0x360\\n ? worker_thread+0x30/0x390\\n ? create_worker+0x1a0/0x1a0\\n ? kthread+0x112/0x130\\n ? kthread_flush_work_fn+0x10/0x10\\n ? ret_from_fork+0x35/0x40\\n===========================================================================\\n\\nIn __mptcp_alloc_tx_skb skb was allocated and skb-\u003etcp_tsorted_anchor will\\nbe initialized, in under memory pressure situation sk_wmem_schedule will\\nreturn false and then kfree_skb. In this case skb-\u003e_skb_refdst is not null\\nbecause_skb_refdst and tcp_tsorted_anchor are stored in the same mem, and\\nkfree_skb will try to release dst and cause crash.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mptcp: Se corrigi\u00f3 el bloqueo debido a que tcp_tsorted_anchor se inicializ\u00f3 antes del lanzamiento de skb Se produjo un bloqueo al realizar una prueba de presi\u00f3n de mptcp: ==================================================================================== dst_release: dst:ffffa06ce6e5c058 refcnt:-1 el kernel intent\u00f3 ejecutar una p\u00e1gina protegida por NX: \u00bfintento de explotaci\u00f3n? (uid: 0) ERROR: no se puede manejar la solicitud de paginaci\u00f3n del n\u00facleo en ffffa06ce6e5c058 PGD 190a01067 P4D 190a01067 PUD 43fffb067 PMD 22e403063 PTE 8000000226e5c063 Oops: 0011 [#1] SMP PTI CPU: 7 PID: 7823 Comm: kworker/7:0 Kdump: cargado Tainted: GE Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.2.1 04/01/2014 Seguimiento de llamadas: ? skb_release_head_state+0x68/0x100 ? skb_release_all+0xe/0x30 ? kfree_skb+0x32/0xa0 ? mptcp_sendmsg_frag+0x57e/0x750 ? __mptcp_retrans+0x21b/0x3c0 ? __switch_to_asm+0x35/0x70 ? mptcp_worker+0x25e/0x320 ? process_one_work+0x1a7/0x360 ? worker_thread+0x30/0x390 ? create_worker+0x1a0/0x1a0 ? kthread+0x112/0x130 ? kthread_flush_work_fn+0x10/0x10 ? ret_from_fork+0x35/0x40\\n=========================================================================== En __mptcp_alloc_tx_skb, se asign\u00f3 skb y se inicializar\u00e1 skb-\u0026gt;tcp_tsorted_anchor. En una situaci\u00f3n de presi\u00f3n de memoria insuficiente, sk_wmem_schedule devolver\u00e1 falso y luego kfree_skb. En este caso, skb-\u0026gt;_skb_refdst no es nulo porque _skb_refdst y tcp_tsorted_anchor est\u00e1n almacenados en la misma memoria y kfree_skb intentar\u00e1 liberar dst y provocar\u00e1 un bloqueo.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.16.19\",\"matchCriteriaId\":\"20C43679-0439-405A-B97F-685BEE50613B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"5.17.2\",\"matchCriteriaId\":\"210C679C-CF84-44A3-8939-E629C87E54BF\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3ef3905aa3b5b3e222ee6eb0210bfd999417a8cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4d54181eba4b077fb74033a7186898ad4000a7a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/752add6f5ce5305e55d8bda4ac8d69be3a09f14d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/af61a8f7603926c26158153d0a0755764d82657c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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