CVE-2022-49209 (GCVE-0-2022-49209)
Vulnerability from cvelistv5
Published
2025-02-26 01:55
Modified
2025-05-04 08:32
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Fix memleak in tcp_bpf_sendmsg while sk msg is full
If tcp_bpf_sendmsg() is running while sk msg is full. When sk_msg_alloc()
returns -ENOMEM error, tcp_bpf_sendmsg() goes to wait_for_memory. If partial
memory has been alloced by sk_msg_alloc(), that is, msg_tx->sg.size is
greater than osize after sk_msg_alloc(), memleak occurs. To fix we use
sk_msg_trim() to release the allocated memory, then goto wait for memory.
Other call paths of sk_msg_alloc() have the similar issue, such as
tls_sw_sendmsg(), so handle sk_msg_trim logic inside sk_msg_alloc(),
as Cong Wang suggested.
This issue can cause the following info:
WARNING: CPU: 3 PID: 7950 at net/core/stream.c:208 sk_stream_kill_queues+0xd4/0x1a0
Call Trace:
<TASK>
inet_csk_destroy_sock+0x55/0x110
__tcp_close+0x279/0x470
tcp_close+0x1f/0x60
inet_release+0x3f/0x80
__sock_release+0x3d/0xb0
sock_close+0x11/0x20
__fput+0x92/0x250
task_work_run+0x6a/0xa0
do_exit+0x33b/0xb60
do_group_exit+0x2f/0xa0
get_signal+0xb6/0x950
arch_do_signal_or_restart+0xac/0x2a0
exit_to_user_mode_prepare+0xa9/0x200
syscall_exit_to_user_mode+0x12/0x30
do_syscall_64+0x46/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
</TASK>
WARNING: CPU: 3 PID: 2094 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x13c/0x260
Call Trace:
<TASK>
__sk_destruct+0x24/0x1f0
sk_psock_destroy+0x19b/0x1c0
process_one_work+0x1b3/0x3c0
kthread+0xe6/0x110
ret_from_fork+0x22/0x30
</TASK>
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ► | Linux | Linux |
Version: 604326b41a6fb9b4a78b6179335decee0365cd8c Version: 604326b41a6fb9b4a78b6179335decee0365cd8c Version: 604326b41a6fb9b4a78b6179335decee0365cd8c Version: 604326b41a6fb9b4a78b6179335decee0365cd8c Version: 604326b41a6fb9b4a78b6179335decee0365cd8c Version: 604326b41a6fb9b4a78b6179335decee0365cd8c |
|
{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix memleak in tcp_bpf_sendmsg while sk msg is full\n\nIf tcp_bpf_sendmsg() is running while sk msg is full. When sk_msg_alloc()\nreturns -ENOMEM error, tcp_bpf_sendmsg() goes to wait_for_memory. If partial\nmemory has been alloced by sk_msg_alloc(), that is, msg_tx-\u003esg.size is\ngreater than osize after sk_msg_alloc(), memleak occurs. To fix we use\nsk_msg_trim() to release the allocated memory, then goto wait for memory.\n\nOther call paths of sk_msg_alloc() have the similar issue, such as\ntls_sw_sendmsg(), so handle sk_msg_trim logic inside sk_msg_alloc(),\nas Cong Wang suggested.\n\nThis issue can cause the following info:\nWARNING: CPU: 3 PID: 7950 at net/core/stream.c:208 sk_stream_kill_queues+0xd4/0x1a0\nCall Trace:\n \u003cTASK\u003e\n inet_csk_destroy_sock+0x55/0x110\n __tcp_close+0x279/0x470\n tcp_close+0x1f/0x60\n inet_release+0x3f/0x80\n __sock_release+0x3d/0xb0\n sock_close+0x11/0x20\n __fput+0x92/0x250\n task_work_run+0x6a/0xa0\n do_exit+0x33b/0xb60\n do_group_exit+0x2f/0xa0\n get_signal+0xb6/0x950\n arch_do_signal_or_restart+0xac/0x2a0\n exit_to_user_mode_prepare+0xa9/0x200\n syscall_exit_to_user_mode+0x12/0x30\n do_syscall_64+0x46/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n \u003c/TASK\u003e\n\nWARNING: CPU: 3 PID: 2094 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x13c/0x260\nCall Trace:\n \u003cTASK\u003e\n __sk_destruct+0x24/0x1f0\n sk_psock_destroy+0x19b/0x1c0\n process_one_work+0x1b3/0x3c0\n kthread+0xe6/0x110\n ret_from_fork+0x22/0x30\n \u003c/TASK\u003e"
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T08:32:24.969Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"url": "https://git.kernel.org/stable/c/d0b85dfc6f01d26808e2576c6537c131b590e270"
},
{
"url": "https://git.kernel.org/stable/c/9c34e38c4a870eb30b13f42f5b44f42e9d19ccb8"
}
],
"title": "bpf, sockmap: Fix memleak in tcp_bpf_sendmsg while sk msg is full",
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"assignerShortName": "Linux",
"cveId": "CVE-2022-49209",
"datePublished": "2025-02-26T01:55:47.154Z",
"dateReserved": "2025-02-26T01:49:39.291Z",
"dateUpdated": "2025-05-04T08:32:24.969Z",
"state": "PUBLISHED"
},
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"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2022-49209\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:00:58.007\",\"lastModified\":\"2025-03-18T20:10:46.370\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf, sockmap: Fix memleak in tcp_bpf_sendmsg while sk msg is full\\n\\nIf tcp_bpf_sendmsg() is running while sk msg is full. When sk_msg_alloc()\\nreturns -ENOMEM error, tcp_bpf_sendmsg() goes to wait_for_memory. If partial\\nmemory has been alloced by sk_msg_alloc(), that is, msg_tx-\u003esg.size is\\ngreater than osize after sk_msg_alloc(), memleak occurs. To fix we use\\nsk_msg_trim() to release the allocated memory, then goto wait for memory.\\n\\nOther call paths of sk_msg_alloc() have the similar issue, such as\\ntls_sw_sendmsg(), so handle sk_msg_trim logic inside sk_msg_alloc(),\\nas Cong Wang suggested.\\n\\nThis issue can cause the following info:\\nWARNING: CPU: 3 PID: 7950 at net/core/stream.c:208 sk_stream_kill_queues+0xd4/0x1a0\\nCall Trace:\\n \u003cTASK\u003e\\n inet_csk_destroy_sock+0x55/0x110\\n __tcp_close+0x279/0x470\\n tcp_close+0x1f/0x60\\n inet_release+0x3f/0x80\\n __sock_release+0x3d/0xb0\\n sock_close+0x11/0x20\\n __fput+0x92/0x250\\n task_work_run+0x6a/0xa0\\n do_exit+0x33b/0xb60\\n do_group_exit+0x2f/0xa0\\n get_signal+0xb6/0x950\\n arch_do_signal_or_restart+0xac/0x2a0\\n exit_to_user_mode_prepare+0xa9/0x200\\n syscall_exit_to_user_mode+0x12/0x30\\n do_syscall_64+0x46/0x80\\n entry_SYSCALL_64_after_hwframe+0x44/0xae\\n \u003c/TASK\u003e\\n\\nWARNING: CPU: 3 PID: 2094 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x13c/0x260\\nCall Trace:\\n \u003cTASK\u003e\\n __sk_destruct+0x24/0x1f0\\n sk_psock_destroy+0x19b/0x1c0\\n process_one_work+0x1b3/0x3c0\\n kthread+0xe6/0x110\\n ret_from_fork+0x22/0x30\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf, sockmap: Se corrige la p\u00e9rdida de memoria en tcp_bpf_sendmsg mientras sk msg est\u00e1 lleno Si tcp_bpf_sendmsg() se est\u00e1 ejecutando mientras sk msg est\u00e1 lleno. Cuando sk_msg_alloc() devuelve el error -ENOMEM, tcp_bpf_sendmsg() va a wait_for_memory. Si sk_msg_alloc() ha asignado memoria parcial, es decir, msg_tx-\u0026gt;sg.size es mayor que osize despu\u00e9s de sk_msg_alloc(), se produce una p\u00e9rdida de memoria. Para solucionarlo, utilizamos sk_msg_trim() para liberar la memoria asignada y luego vamos a esperar memoria. Otras rutas de llamada de sk_msg_alloc() tienen un problema similar, como tls_sw_sendmsg(), as\u00ed que maneje la l\u00f3gica de sk_msg_trim dentro de sk_msg_alloc(), como sugiri\u00f3 Cong Wang. Este problema puede generar la siguiente informaci\u00f3n: ADVERTENCIA: CPU: 3 PID: 7950 en net/core/stream.c:208 sk_stream_kill_queues+0xd4/0x1a0 Seguimiento de llamadas: inet_csk_destroy_sock+0x55/0x110 __tcp_close+0x279/0x470 tcp_close+0x1f/0x60 inet_release+0x3f/0x80 __sock_release+0x3d/0xb0 sock_close+0x11/0x20 __fput+0x92/0x250 task_work_run+0x6a/0xa0 do_exit+0x33b/0xb60 do_group_exit+0x2f/0xa0 get_signal+0xb6/0x950 arch_do_signal_or_restart+0xac/0x2a0 exit_to_user_mode_prepare+0xa9/0x200 syscall_exit_to_user_mode+0x12/0x30 do_syscall_64+0x46/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae ADVERTENCIA: CPU: 3 PID: 2094 en net/ipv4/af_inet.c:155 inet_sock_destruct+0x13c/0x260 Rastreo de llamadas: __sk_destruct+0x24/0x1f0 sk_psock_destroy+0x19b/0x1c0 process_one_work+0x1b3/0x3c0 kthread+0xe6/0x110 ret_from_fork+0x22/0x30 \"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.189\",\"matchCriteriaId\":\"8CB6E8F5-C2B1-46F3-A807-0F6104AC340F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.110\",\"matchCriteriaId\":\"91D3BFD0-D3F3-4018-957C-96CCBF357D79\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.33\",\"matchCriteriaId\":\"27C42AE8-B387-43E2-938A-E1C8B40BE6D5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.16.19\",\"matchCriteriaId\":\"20C43679-0439-405A-B97F-685BEE50613B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"5.17.2\",\"matchCriteriaId\":\"210C679C-CF84-44A3-8939-E629C87E54BF\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6d03722c34d9603df325f67c6d30dc1b7b3c6067\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9c34e38c4a870eb30b13f42f5b44f42e9d19ccb8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bec34a91eba3483e1830c02bdd36f8f968642047\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d0b85dfc6f01d26808e2576c6537c131b590e270\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/de3a8d8fab0710186f7864ec812836d8d70da3c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f677328f05f52d535cbdc15cb04476db49477eb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
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}