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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)
guessed Create a notification for this product.
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": "2026-09-14T11:55:37+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": "2026-09-11T02:11:30Z",
      "cve": "CVE-2024-50142",
      "id": "CVE-2024-50142",
      "initial_release_date": "2024-11-08T03:49:13Z",
      "product_status:known_affected": "772",
      "product_status:known_not_affected": "50",
      "product_status:recommended": "447",
      "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": "92"
    },
    "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

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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.