{"metadata": {"vulnerability": "CVE-2026-99139", "count": 26, "kinds": {"milestone": 9, "sighting": 1, "kev": 0, "other": 16}}, "data": [{"timestamp": "2026-09-25T10:25:14.395Z", "date_only": false, "value": "2026-09-25T10:25:14.395Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-99139", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-28T10:34:50.674Z", "date_only": false, "value": "2026-10-28T10:34:50.674Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-99139", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-28T11:10:08.236Z", "date_only": false, "value": "2026-10-28T11:10:08.236502Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117518225096696540", "record": "CVE-2026-99139", "field": "creation_timestamp", "uuid": "3c2da721-bb95-4846-b1dd-0f73349eb99f", "content": "CVE-2026-99139 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION) In the Linux kernel, the following vulnerability has been resolved:\ntcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION)\ndo_tcp_getsockopt() reads icsk->icsk_ca_ops->name without holdingrcu_read_lock(). Since commit 0baf26b0fcd7 (\"bpf: tcp: Supporttcp_congestion_ops in bpf\"), icsk_ca_ops can point to dynamicallyallocated BPF struct_ops memory that may be freed concurrently viasetsockopt(TCP_CONGESTION), leading to a use-after-free.\n  BUG: KASAN: slab-use-after-free in _copy_to_user+0x37/0x60  Read of size 16 at addr ffff888013505260 by task exploit/149   _copy_to_user+0x37/0x60   do_tcp_getsockopt+0x158a/0x2460 (net/ipv4/tcp.c:4585)   tcp_getsockopt+0x91/0xf0   __sys_getsockopt+0xf7/0x170\nFix this by holding rcu_read_lock() around the ca_ops->name access,using READ_ONCE() to load icsk_ca_ops, and copying the name to astack buffer before releasing the lock. Also annotate the relevanticsk_ca_ops stores with WRITE_ONCE() to fix the accompanying KCSANdata-race issue.\nhttps://www.cve.org/CVERecord?id=CVE-2026-99139https://git.kernel.org/stable/c/c1804ef016392dd91267d2207ee43b1de34302cahttps://git.kernel.org/stable/c/a8e45471afa230c1431c26c8e99ec24377e3b514https://git.kernel.org/stable/c/5271b79b7ad68dcb222e893773f92bdabf7750f3#kernel #Linux#CVE_2026_99139#bot", "url": "https://infosec.exchange/users/cve/statuses/117518225096696540"}, {"timestamp": "2026-10-28T11:17:00Z", "date_only": false, "value": "2026-10-28T11:17:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99139", "record": "UBUNTU-CVE-2026-99139", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-28T11:17:33Z", "date_only": false, "value": "2026-10-28T11:17:33Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-48CQ-P2FM-8444", 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