CVE-2024-50142 (GCVE-0-2024-50142)

Vulnerability from cvelistv5 – Published: 2024-11-07 09:31 – Updated: 2026-05-12 12:00
VLAI
Title
xfrm: validate new SA's prefixlen using SA family when sel.family is unset
Summary
In the Linux kernel, the following vulnerability has been resolved: xfrm: validate new SA's prefixlen using SA family when sel.family is unset This expands the validation introduced in commit 07bf7908950a ("xfrm: Validate address prefix lengths in the xfrm selector.") syzbot created an SA with usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Because of the AF_UNSPEC selector, verify_newsa_info doesn't put limits on prefixlen_{s,d}. But then copy_from_user_state sets x->sel.family to usersa.family (AF_INET). Do the same conversion in verify_newsa_info before validating prefixlen_{s,d}, since that's how prefixlen is going to be used later on.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 20:21 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f31398570acf0f0804c644006f7bfa9067106b0a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 401ad99a5ae7180dd9449eac104cb755f442e7f3 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bce1afaa212ec380bf971614f70909a27882b862 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7d9868180bd1e4cf37e7c5067362658971162366 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e68dd80ba498265d2266b12dc3459164f4ff0c4a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.19.323 , ≤ 4.19.* (semver)
Unaffected: 5.4.285 , ≤ 5.4.* (semver)
Unaffected: 5.10.229 , ≤ 5.10.* (semver)
Unaffected: 5.15.170 , ≤ 5.15.* (semver)
Unaffected: 6.1.115 , ≤ 6.1.* (semver)
Unaffected: 6.6.59 , ≤ 6.6.* (semver)
Unaffected: 6.11.6 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
guessed Create a notification for this product.
Show details on NVD website
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      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-noinfo\"}]}]"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-19T01:06:49.000Z",
      "cve": "CVE-2024-50142",
      "id": "msrc_CVE-2024-50142",
      "initial_release_date": "2024-11-02T00:00:00.000Z",
      "product_status:fixed": "5",
      "product_status:known_affected": "5",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "xfrm: validate new SA\u0027s prefixlen using SA family when sel.family is unset",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-50142.json",
      "version": "3"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-50142\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-11-07T10:15:06.170\",\"lastModified\":\"2026-06-17T08:03:41.820\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxfrm: validate new SA\u0027s prefixlen using SA family when sel.family is unset\\n\\nThis expands the validation introduced in commit 07bf7908950a (\\\"xfrm:\\nValidate address prefix lengths in the xfrm selector.\\\")\\n\\nsyzbot created an SA with\\n    usersa.sel.family = AF_UNSPEC\\n    usersa.sel.prefixlen_s = 128\\n    usersa.family = AF_INET\\n\\nBecause of the AF_UNSPEC selector, verify_newsa_info doesn\u0027t put\\nlimits on prefixlen_{s,d}. But then copy_from_user_state sets\\nx-\u003esel.family to usersa.family (AF_INET). Do the same conversion in\\nverify_newsa_info before validating prefixlen_{s,d}, since that\u0027s how\\nprefixlen is going to be used later on.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xfrm: validar el prefijo de la nueva SA usando la familia de SA cuando sel.family no est\u00e1 configurado Esto expande la validaci\u00f3n introducida en el commit 07bf7908950a (\\\"xfrm: validar las longitudes de prefijo de direcci\u00f3n en el selector xfrm\\\"). syzbot cre\u00f3 una SA con usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Debido al selector AF_UNSPEC, verificar_newsa_info no pone l\u00edmites en prefixlen_{s,d}. Pero luego copy_from_user_state establece x-\u0026gt;sel.family en usersa.family (AF_INET). Realice la misma conversi\u00f3n en verificar_newsa_info antes de validar prefixlen_{s,d}, ya que as\u00ed es como se usar\u00e1 prefixlen m\u00e1s 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T08:08:47+00:00",
      "cve": "CVE-2024-50142",
      "id": "CVE-2024-50142",
      "initial_release_date": "2024-11-07T00:00:00+00:00",
      "product_status:fixed": "709",
      "product_status:known_affected": "64",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xfrm: validate new SA\u0026#39;s prefixlen using SA family when sel.family is unset",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-50142.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T01:27:44Z",
      "cve": "CVE-2024-50142",
      "id": "CVE-2024-50142",
      "initial_release_date": "2024-11-08T03:49:13Z",
      "product_status:known_affected": "689",
      "product_status:known_not_affected": "54",
      "product_status:recommended": "477",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-50142",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-50142.json",
      "version": "90"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:26:01.031Z\"}}, {\"affected\": [{\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"x_adpType\": \"supplier\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\"}], \"providerMetadata\": {\"orgId\": \"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\", \"shortName\": \"siemens-SADP\", \"dateUpdated\": \"2026-05-12T12:00:20.085Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": 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\"programFiles\": [\"net/xfrm/xfrm_user.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f31398570acf0f0804c644006f7bfa9067106b0a\"}, {\"url\": \"https://git.kernel.org/stable/c/401ad99a5ae7180dd9449eac104cb755f442e7f3\"}, {\"url\": \"https://git.kernel.org/stable/c/8df5cd51fd70c33aa1776e5cbcd82b0a86649d73\"}, {\"url\": \"https://git.kernel.org/stable/c/2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71\"}, {\"url\": \"https://git.kernel.org/stable/c/bce1afaa212ec380bf971614f70909a27882b862\"}, {\"url\": \"https://git.kernel.org/stable/c/7d9868180bd1e4cf37e7c5067362658971162366\"}, {\"url\": \"https://git.kernel.org/stable/c/e68dd80ba498265d2266b12dc3459164f4ff0c4a\"}, {\"url\": \"https://git.kernel.org/stable/c/3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxfrm: validate new SA\u0027s prefixlen using SA family when sel.family is unset\\n\\nThis expands the validation introduced in commit 07bf7908950a (\\\"xfrm:\\nValidate address prefix lengths in the xfrm selector.\\\")\\n\\nsyzbot created an SA with\\n    usersa.sel.family = AF_UNSPEC\\n    usersa.sel.prefixlen_s = 128\\n    usersa.family = AF_INET\\n\\nBecause of the AF_UNSPEC selector, verify_newsa_info doesn\u0027t put\\nlimits on prefixlen_{s,d}. But then copy_from_user_state sets\\nx-\u003esel.family to usersa.family (AF_INET). Do the same conversion in\\nverify_newsa_info before validating prefixlen_{s,d}, since that\u0027s how\\nprefixlen is going to be used later on.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.323\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.285\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.229\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.170\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.115\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.59\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.6\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"2.6.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:46:15.651Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50142\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-12T12:00:20.085Z\", \"dateReserved\": \"2024-10-21T19:36:19.956Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-07T09:31:19.415Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.