{"id":"CVE-2024-36489","state":"PUBLISHED","title":"tls: fix missing memory barrier in tls_init","description":"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->sk_proto = READ_ONCE(sk->sk_prot) -(1)\n\n// In update_sk_prot()\nWRITE_ONCE(sk->sk_prot, tls_prots)     -(2)\n\n                                   // In sock_common_setsockopt()\n                                   READ_ONCE(sk->sk_prot)->setsockopt()\n\n                                   // In tls_{setsockopt,getsockopt}()\n                                   ctx->sk_proto->setsockopt()    -(3)\n\nIn the above scenario, when (1) and (2) are reordered, (3) can observe\nthe NULL value of ctx->sk_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->sk_proto is\ninitialized, we can ensure that ctx->sk_proto are visible when\nchanging sk->sk_prot.","publishedAt":"2024-06-21T10:18:10.327Z","updatedAt":"2026-10-15T00:42:32.133Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"d72e126e9a36d3d33889829df8fc90100bb0e071","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"2c260a24cf1c4d30ea3646124f766ee46169280b","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"335c8f1566d8e44c384d16b450a18554896d4e8b","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"ab67c2fd3d070a21914d0c31319d3858ab4e199c","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"ef21007a7b581c7fe64d5a10c320880a033c837b","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"91e61dd7a0af660408e87372d8330ceb218be302","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tls/tls_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.219","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.161","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.93","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.33","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.4","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tls/tls_main.c"]}],"references":["https://git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071","https://git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b","https://git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b","https://git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c","https://git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b","https://git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302","https://cert-portal.siemens.com/productcert/html/ssa-265688.html","https://cert-portal.siemens.com/productcert/html/ssa-613116.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:30.303Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/36xxx/CVE-2024-36489.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-36489","state":"PUBLISHED","datePublished":"2024-06-21T10:18:10.327Z","dateUpdated":"2026-10-15T00:42:32.133Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-06-21T10:12:11.459Z"},"containers":{"cna":{"title":"tls: fix missing memory barrier in tls_init","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->sk_proto = READ_ONCE(sk->sk_prot) -(1)\n\n// In update_sk_prot()\nWRITE_ONCE(sk->sk_prot, tls_prots)     -(2)\n\n                                   // In sock_common_setsockopt()\n                                   READ_ONCE(sk->sk_prot)->setsockopt()\n\n                                   // In tls_{setsockopt,getsockopt}()\n                                   ctx->sk_proto->setsockopt()    -(3)\n\nIn the above scenario, when (1) and (2) are reordered, (3) can observe\nthe NULL value of ctx->sk_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->sk_proto is\ninitialized, we can ensure that ctx->sk_proto are visible when\nchanging sk->sk_prot."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"d72e126e9a36d3d33889829df8fc90100bb0e071","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"2c260a24cf1c4d30ea3646124f766ee46169280b","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"335c8f1566d8e44c384d16b450a18554896d4e8b","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"ab67c2fd3d070a21914d0c31319d3858ab4e199c","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"ef21007a7b581c7fe64d5a10c320880a033c837b","versionType":"git"},{"version":"d5bee7374b68de3c44586d46e9e61ffc97a1e886","status":"affected","lessThan":"91e61dd7a0af660408e87372d8330ceb218be302","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tls/tls_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.219","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.161","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.93","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.33","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.4","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tls/tls_main.c"]}],"references":[{"url":"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:16:16.431Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.10.219"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.9.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.10"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE 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