{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-39852", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.142Z", "datePublished": "2025-09-19T15:26:24.312Z", "dateUpdated": "2026-05-11T21:37:41.374Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:37:41.374Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tcp: Fix socket memory leak in TCP-AO failure handling for IPv6\n\nWhen tcp_ao_copy_all_matching() fails in tcp_v6_syn_recv_sock() it just\nexits the function. This ends up causing a memory-leak:\n\nunreferenced object 0xffff0000281a8200 (size 2496):\n comm \"softirq\", pid 0, jiffies 4295174684\n hex dump (first 32 bytes):\n 7f 00 00 06 7f 00 00 06 00 00 00 00 cb a8 88 13 ................\n 0a 00 03 61 00 00 00 00 00 00 00 00 00 00 00 00 ...a............\n backtrace (crc 5ebdbe15):\n kmemleak_alloc+0x44/0xe0\n kmem_cache_alloc_noprof+0x248/0x470\n sk_prot_alloc+0x48/0x120\n sk_clone_lock+0x38/0x3b0\n inet_csk_clone_lock+0x34/0x150\n tcp_create_openreq_child+0x3c/0x4a8\n tcp_v6_syn_recv_sock+0x1c0/0x620\n tcp_check_req+0x588/0x790\n tcp_v6_rcv+0x5d0/0xc18\n ip6_protocol_deliver_rcu+0x2d8/0x4c0\n ip6_input_finish+0x74/0x148\n ip6_input+0x50/0x118\n ip6_sublist_rcv+0x2fc/0x3b0\n ipv6_list_rcv+0x114/0x170\n __netif_receive_skb_list_core+0x16c/0x200\n netif_receive_skb_list_internal+0x1f0/0x2d0\n\nThis is because in tcp_v6_syn_recv_sock (and the IPv4 counterpart), when\nexiting upon error, inet_csk_prepare_forced_close() and tcp_done() need\nto be called. They make sure the newsk will end up being correctly\nfree'd.\n\ntcp_v4_syn_recv_sock() makes this very clear by having the put_and_exit\nlabel that takes care of things. So, this patch here makes sure\ntcp_v4_syn_recv_sock and tcp_v6_syn_recv_sock have similar\nerror-handling and thus fixes the leak for TCP-AO." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/tcp_ipv6.c" ], "versions": [ { "version": "06b22ef29591f625ef877ae00d82192938e29e60", "lessThan": "46d33c878fc0b3d7570366b2c9912395b3f4e701", "status": "affected", "versionType": "git" }, { "version": "06b22ef29591f625ef877ae00d82192938e29e60", "lessThan": "3d2b356d994a8801acb397cafd28b13672c37ab5", "status": "affected", "versionType": "git" }, { "version": "06b22ef29591f625ef877ae00d82192938e29e60", "lessThan": "fa390321aba0a54d0f7ae95ee4ecde1358bb9234", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/tcp_ipv6.c" ], "versions": [ { "version": "6.7", "status": "affected" }, { "version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.46", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.6", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.46" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.16.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/46d33c878fc0b3d7570366b2c9912395b3f4e701" }, { "url": "https://git.kernel.org/stable/c/3d2b356d994a8801acb397cafd28b13672c37ab5" }, { "url": "https://git.kernel.org/stable/c/fa390321aba0a54d0f7ae95ee4ecde1358bb9234" } ], "title": "net/tcp: Fix socket memory leak in TCP-AO failure handling for IPv6", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2025-39852", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T19:21:28.643713Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T19:23:12.597Z" } } ] } }