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CVE-2024-36489 (GCVE-0-2024-36489)

Vulnerability from cvelistv5 – Published: 2024-06-21 10:18 – Updated: 2026-05-12 11:53
VLAI
Title
tls: fix missing memory barrier in tls_init
Summary
In the Linux kernel, the following vulnerability has been resolved: tls: fix missing memory barrier in tls_init In tls_init(), a write memory barrier is missing, and store-store reordering may cause NULL dereference in tls_{setsockopt,getsockopt}. CPU0 CPU1 ----- ----- // In tls_init() // In tls_ctx_create() ctx = kzalloc() ctx->sk_proto = READ_ONCE(sk->sk_prot) -(1) // In update_sk_prot() WRITE_ONCE(sk->sk_prot, tls_prots) -(2) // In sock_common_setsockopt() READ_ONCE(sk->sk_prot)->setsockopt() // In tls_{setsockopt,getsockopt}() ctx->sk_proto->setsockopt() -(3) In the above scenario, when (1) and (2) are reordered, (3) can observe the NULL value of ctx->sk_proto, causing NULL dereference. To fix it, we rely on rcu_assign_pointer() which implies the release barrier semantic. By moving rcu_assign_pointer() after ctx->sk_proto is initialized, we can ensure that ctx->sk_proto are visible when changing sk->sk_prot.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:09 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d5bee7374b68de3c44586d46e9e61ffc97a1e886 , < d72e126e9a36d3d33889829df8fc90100bb0e071 (git)
Affected: d5bee7374b68de3c44586d46e9e61ffc97a1e886 , < 2c260a24cf1c4d30ea3646124f766ee46169280b (git)
Affected: d5bee7374b68de3c44586d46e9e61ffc97a1e886 , < 335c8f1566d8e44c384d16b450a18554896d4e8b (git)
Affected: d5bee7374b68de3c44586d46e9e61ffc97a1e886 , < ab67c2fd3d070a21914d0c31319d3858ab4e199c (git)
Affected: d5bee7374b68de3c44586d46e9e61ffc97a1e886 , < ef21007a7b581c7fe64d5a10c320880a033c837b (git)
Affected: d5bee7374b68de3c44586d46e9e61ffc97a1e886 , < 91e61dd7a0af660408e87372d8330ceb218be302 (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.219 , ≤ 5.10.* (semver)
Unaffected: 5.15.161 , ≤ 5.15.* (semver)
Unaffected: 6.1.93 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.9.4 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.1 (custom)
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Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Unaffected: 0 , < * (custom)
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Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.1 (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]"
    },
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By moving rcu_assign_pointer() after ctx-\u003esk_proto is\\ninitialized, we can ensure that ctx-\u003esk_proto are visible when\\nchanging sk-\u003esk_prot.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tls: corrige la barrera de memoria faltante en tls_init En tls_init(), falta una barrera de memoria de escritura y el reordenamiento tienda-tienda puede causar una desreferencia NULL en tls_{setsockopt,getsockopt}. CPU0 CPU1 ----- ----- // En tls_init() // En tls_ctx_create() ctx = kzalloc() ctx-\u0026gt;sk_proto = READ_ONCE(sk-\u0026gt;sk_prot) -(1) // En update_sk_prot( ) WRITE_ONCE(sk-\u0026gt;sk_prot, tls_prots) -(2) // En sock_common_setsockopt() READ_ONCE(sk-\u0026gt;sk_prot)-\u0026gt;setsockopt() // En tls_{setsockopt,getsockopt}() ctx-\u0026gt;sk_proto-\u0026gt;setsockopt () -(3) En el escenario anterior, cuando (1) y (2) se reordenan, (3) puede observar el valor NULL de ctx-\u0026gt;sk_proto, lo que provoca la desreferencia NULL. Para solucionarlo, confiamos en rcu_assign_pointer() que implica la sem\u00e1ntica de barrera de liberaci\u00f3n. Al mover rcu_assign_pointer() despu\u00e9s de inicializar ctx-\u0026gt;sk_proto, podemos asegurarnos de que ctx-\u0026gt;sk_proto sean visibles al cambiar sk-\u0026gt;sk_prot.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/tls/tls_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d5bee7374b68de3c44586d46e9e61ffc97a1e886\",\"lessThan\":\"d72e126e9a36d3d33889829df8fc90100bb0e071\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d5bee7374b68de3c44586d46e9e61ffc97a1e886\",\"lessThan\":\"2c260a24cf1c4d30ea3646124f766ee46169280b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d5bee7374b68de3c44586d46e9e61ffc97a1e886\",\"lessThan\":\"335c8f1566d8e44c384d16b450a18554896d4e8b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d5bee7374b68de3c44586d46e9e61ffc97a1e886\",\"lessThan\":\"ab67c2fd3d070a21914d0c31319d3858ab4e199c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d5bee7374b68de3c44586d46e9e61ffc97a1e886\",\"lessThan\":\"ef21007a7b581c7fe64d5a10c320880a033c837b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d5bee7374b68de3c44586d46e9e61ffc97a1e886\",\"lessThan\":\"91e61dd7a0af660408e87372d8330ceb218be302\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/tls/tls_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.219\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.161\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.93\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.33\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.9.4\",\"lessThanOrEqual\":\"6.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"RUGGEDCOM RST2428P\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V3.1\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SCALANCE XCM-/XRM-/XCH-/XRH-300 family\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V3.1\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 TM MFP - 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:52:19+00:00",
      "cve": "CVE-2024-36489",
      "id": "CVE-2024-36489",
      "initial_release_date": "2024-06-21T00:00:00+00:00",
      "product_status:fixed": "929",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "51",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tls: fix missing memory barrier in tls_init",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-36489.json",
      "version": "3"
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    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-30T02:35:50Z",
      "cve": "CVE-2024-36489",
      "id": "CVE-2024-36489",
      "initial_release_date": "2024-06-24T23:17:03Z",
      "product_status:known_affected": "448",
      "product_status:known_not_affected": "176",
      "product_status:recommended": "692",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-36489",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-36489.json",
      "version": "95"
    },
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\"https://git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071\"}, {\"url\": \"https://git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b\"}, {\"url\": \"https://git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b\"}, {\"url\": \"https://git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c\"}, {\"url\": \"https://git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b\"}, {\"url\": \"https://git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntls: fix missing memory barrier in tls_init\\n\\nIn tls_init(), a write memory barrier is missing, and store-store\\nreordering may cause NULL dereference in tls_{setsockopt,getsockopt}.\\n\\nCPU0                               CPU1\\n-----                              -----\\n// In tls_init()\\n// In tls_ctx_create()\\nctx = kzalloc()\\nctx-\u003esk_proto = READ_ONCE(sk-\u003esk_prot) -(1)\\n\\n// In update_sk_prot()\\nWRITE_ONCE(sk-\u003esk_prot, tls_prots)     -(2)\\n\\n                                   // In sock_common_setsockopt()\\n                                   READ_ONCE(sk-\u003esk_prot)-\u003esetsockopt()\\n\\n                                   // In tls_{setsockopt,getsockopt}()\\n                                   ctx-\u003esk_proto-\u003esetsockopt()    -(3)\\n\\nIn the above scenario, when (1) and (2) are reordered, (3) can observe\\nthe NULL value of ctx-\u003esk_proto, causing NULL dereference.\\n\\nTo fix it, we rely on rcu_assign_pointer() which implies the release\\nbarrier semantic. By moving rcu_assign_pointer() after ctx-\u003esk_proto is\\ninitialized, we can ensure that ctx-\u003esk_proto are visible when\\nchanging sk-\u003esk_prot.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.219\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.161\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.93\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.33\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.4\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:16:16.431Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-36489\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:16:16.431Z\", \"dateReserved\": \"2024-06-21T10:12:11.459Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-21T10:18:10.327Z\", \"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.


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.