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

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-11-05 19:49
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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 19:44 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 289f2f58266777f45a52cd55dea96d736e6244c9 , < af61a8f7603926c26158153d0a0755764d82657c (git)
Affected: f70cad1085d1e01d3ec73c1078405f906237feee , < 752add6f5ce5305e55d8bda4ac8d69be3a09f14d (git)
Affected: f70cad1085d1e01d3ec73c1078405f906237feee , < 4d54181eba4b077fb74033a7186898ad4000a7a5 (git)
Affected: f70cad1085d1e01d3ec73c1078405f906237feee , < 3ef3905aa3b5b3e222ee6eb0210bfd999417a8cc (git)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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            "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."
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                  "lessThan": "752add6f5ce5305e55d8bda4ac8d69be3a09f14d",
                  "status": "affected",
                  "version": "f70cad1085d1e01d3ec73c1078405f906237feee",
                  "versionType": "git"
                },
                {
                  "lessThan": "4d54181eba4b077fb74033a7186898ad4000a7a5",
                  "status": "affected",
                  "version": "f70cad1085d1e01d3ec73c1078405f906237feee",
                  "versionType": "git"
                },
                {
                  "lessThan": "3ef3905aa3b5b3e222ee6eb0210bfd999417a8cc",
                  "status": "affected",
                  "version": "f70cad1085d1e01d3ec73c1078405f906237feee",
                  "versionType": "git"
                }
              ]
            },
            {
              "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": [
                {
                  "status": "affected",
                  "version": "5.16"
                },
                {
                  "lessThan": "5.16",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.16.*",
                  "status": "unaffected",
                  "version": "5.16.19",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.17.*",
                  "status": "unaffected",
                  "version": "5.17.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.18",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.16.19",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.17.2",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "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": "2026-05-11T18:55:02.040Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/af61a8f7603926c26158153d0a0755764d82657c"
            },
            {
              "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": "2026-11-05T19:49:37.133Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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