CVE-2025-21683 (GCVE-0-2025-21683)
Vulnerability from cvelistv5
Published
2025-01-31 11:25
Modified
2025-05-04 07:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_sk_select_reuseport() memory leak As pointed out in the original comment, lookup in sockmap can return a TCP ESTABLISHED socket. Such TCP socket may have had SO_ATTACH_REUSEPORT_EBPF set before it was ESTABLISHED. In other words, a non-NULL sk_reuseport_cb does not imply a non-refcounted socket. Drop sk's reference in both error paths. unreferenced object 0xffff888101911800 (size 2048): comm "test_progs", pid 44109, jiffies 4297131437 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 9336483b): __kmalloc_noprof+0x3bf/0x560 __reuseport_alloc+0x1d/0x40 reuseport_alloc+0xca/0x150 reuseport_attach_prog+0x87/0x140 sk_reuseport_attach_bpf+0xc8/0x100 sk_setsockopt+0x1181/0x1990 do_sock_setsockopt+0x12b/0x160 __sys_setsockopt+0x7b/0xc0 __x64_sys_setsockopt+0x1b/0x30 do_syscall_64+0x93/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e
Impacted products
Vendor Product Version
Linux Linux Version: 64d85290d79c0677edb5a8ee2295b36c022fa5df
Version: 64d85290d79c0677edb5a8ee2295b36c022fa5df
Version: 64d85290d79c0677edb5a8ee2295b36c022fa5df
Version: 64d85290d79c0677edb5a8ee2295b36c022fa5df
Version: 64d85290d79c0677edb5a8ee2295b36c022fa5df
Version: 64d85290d79c0677edb5a8ee2295b36c022fa5df
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   Linux Linux Version: 5.8
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix bpf_sk_select_reuseport() memory leak\n\nAs pointed out in the original comment, lookup in sockmap can return a TCP\nESTABLISHED socket. Such TCP socket may have had SO_ATTACH_REUSEPORT_EBPF\nset before it was ESTABLISHED. In other words, a non-NULL sk_reuseport_cb\ndoes not imply a non-refcounted socket.\n\nDrop sk\u0027s reference in both error paths.\n\nunreferenced object 0xffff888101911800 (size 2048):\n  comm \"test_progs\", pid 44109, jiffies 4297131437\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace (crc 9336483b):\n    __kmalloc_noprof+0x3bf/0x560\n    __reuseport_alloc+0x1d/0x40\n    reuseport_alloc+0xca/0x150\n    reuseport_attach_prog+0x87/0x140\n    sk_reuseport_attach_bpf+0xc8/0x100\n    sk_setsockopt+0x1181/0x1990\n    do_sock_setsockopt+0x12b/0x160\n    __sys_setsockopt+0x7b/0xc0\n    __x64_sys_setsockopt+0x1b/0x30\n    do_syscall_64+0x93/0x180\n    entry_SYSCALL_64_after_hwframe+0x76/0x7e"
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    "dateReserved": "2024-12-29T08:45:45.739Z",
    "dateUpdated": "2025-05-04T07:18:58.841Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21683\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-01-31T12:15:29.460\",\"lastModified\":\"2025-02-03T20:01:29.163\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Fix bpf_sk_select_reuseport() memory leak\\n\\nAs pointed out in the original comment, lookup in sockmap can return a TCP\\nESTABLISHED socket. Such TCP socket may have had SO_ATTACH_REUSEPORT_EBPF\\nset before it was ESTABLISHED. In other words, a non-NULL sk_reuseport_cb\\ndoes not imply a non-refcounted socket.\\n\\nDrop sk\u0027s reference in both error paths.\\n\\nunreferenced object 0xffff888101911800 (size 2048):\\n  comm \\\"test_progs\\\", pid 44109, jiffies 4297131437\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n  backtrace (crc 9336483b):\\n    __kmalloc_noprof+0x3bf/0x560\\n    __reuseport_alloc+0x1d/0x40\\n    reuseport_alloc+0xca/0x150\\n    reuseport_attach_prog+0x87/0x140\\n    sk_reuseport_attach_bpf+0xc8/0x100\\n    sk_setsockopt+0x1181/0x1990\\n    do_sock_setsockopt+0x12b/0x160\\n    __sys_setsockopt+0x7b/0xc0\\n    __x64_sys_setsockopt+0x1b/0x30\\n    do_syscall_64+0x93/0x180\\n    entry_SYSCALL_64_after_hwframe+0x76/0x7e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Se solucion\u00f3 la p\u00e9rdida de memoria de bpf_sk_select_reuseport() Como se se\u00f1al\u00f3 en el comentario original, la b\u00fasqueda en sockmap puede devolver un socket TCP ESTABLISHED. 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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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