FKIE_CVE-2023-52885
Vulnerability from fkie_nvd - Published: 2024-07-14 08:15 - Updated: 2026-08-04 10:18
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/
Summary
In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: Fix UAF in svc_tcp_listen_data_ready()
After the listener svc_sock is freed, and before invoking svc_tcp_accept()
for the established child sock, there is a window that the newsock
retaining a freed listener svc_sock in sk_user_data which cloning from
parent. In the race window, if data is received on the newsock, we will
observe use-after-free report in svc_tcp_listen_data_ready().
Reproduce by two tasks:
1. while :; do rpc.nfsd 0 ; rpc.nfsd; done
2. while :; do echo "" | ncat -4 127.0.0.1 2049 ; done
KASAN report:
==================================================================
BUG: KASAN: slab-use-after-free in svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc]
Read of size 8 at addr ffff888139d96228 by task nc/102553
CPU: 7 PID: 102553 Comm: nc Not tainted 6.3.0+ #18
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
Call Trace:
<IRQ>
dump_stack_lvl+0x33/0x50
print_address_description.constprop.0+0x27/0x310
print_report+0x3e/0x70
kasan_report+0xae/0xe0
svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc]
tcp_data_queue+0x9f4/0x20e0
tcp_rcv_established+0x666/0x1f60
tcp_v4_do_rcv+0x51c/0x850
tcp_v4_rcv+0x23fc/0x2e80
ip_protocol_deliver_rcu+0x62/0x300
ip_local_deliver_finish+0x267/0x350
ip_local_deliver+0x18b/0x2d0
ip_rcv+0x2fb/0x370
__netif_receive_skb_one_core+0x166/0x1b0
process_backlog+0x24c/0x5e0
__napi_poll+0xa2/0x500
net_rx_action+0x854/0xc90
__do_softirq+0x1bb/0x5de
do_softirq+0xcb/0x100
</IRQ>
<TASK>
...
</TASK>
Allocated by task 102371:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
__kasan_kmalloc+0x7b/0x90
svc_setup_socket+0x52/0x4f0 [sunrpc]
svc_addsock+0x20d/0x400 [sunrpc]
__write_ports_addfd+0x209/0x390 [nfsd]
write_ports+0x239/0x2c0 [nfsd]
nfsctl_transaction_write+0xac/0x110 [nfsd]
vfs_write+0x1c3/0xae0
ksys_write+0xed/0x1c0
do_syscall_64+0x38/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Freed by task 102551:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
kasan_save_free_info+0x2a/0x50
__kasan_slab_free+0x106/0x190
__kmem_cache_free+0x133/0x270
svc_xprt_free+0x1e2/0x350 [sunrpc]
svc_xprt_destroy_all+0x25a/0x440 [sunrpc]
nfsd_put+0x125/0x240 [nfsd]
nfsd_svc+0x2cb/0x3c0 [nfsd]
write_threads+0x1ac/0x2a0 [nfsd]
nfsctl_transaction_write+0xac/0x110 [nfsd]
vfs_write+0x1c3/0xae0
ksys_write+0xed/0x1c0
do_syscall_64+0x38/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Fix the UAF by simply doing nothing in svc_tcp_listen_data_ready()
if state != TCP_LISTEN, that will avoid dereferencing svsk for all
child socket.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/sunrpc/svcsock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "c7b8c2d06e437639694abe76978e915cfb73f428",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
},
{
"lessThan": "dfc896c4a75cb8cd7cb2dfd9b469cf1e3f004254",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
},
{
"lessThan": "42725e5c1b181b757ba11d804443922982334d9b",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
},
{
"lessThan": "cd5ec3ee52ce4b7e283cc11facfa420c297c8065",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
},
{
"lessThan": "fbf4ace39b2e4f3833236afbb2336edbafd75eee",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
},
{
"lessThan": "ef047411887ff0845afd642d6a687819308e1a4e",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
},
{
"lessThan": "7e1f989055622fd086c5dfb291fc72adf5660b6f",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
},
{
"lessThan": "fc80fc2d4e39137869da3150ee169b40bf879287",
"status": "affected",
"version": "fa9251afc33c81606d70cfe91800a779096442ec",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/sunrpc/svcsock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"lessThan": "4.8",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.322",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.291",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.251",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.188",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.121",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.4.*",
"status": "unaffected",
"version": "6.4.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.5",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "EA304272-C8A2-45E1-8E51-A4EAB3581183",
"versionEndExcluding": "4.14.322",
"versionStartIncluding": "4.8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D2D2CA9F-4CC4-4AF5-8C6D-E58415AB782E",
"versionEndExcluding": "4.19.291",
"versionStartIncluding": "4.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7FA663C4-CA72-4B5A-8592-7354D978F58E",
"versionEndExcluding": "5.4.251",
"versionStartIncluding": "4.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "43CAE50A-4A6C-488E-813C-F8DB77C13C8B",
"versionEndExcluding": "5.10.188",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "EC77775B-EC31-4966-966C-1286C02B2A85",
"versionEndExcluding": "5.15.121",
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9BD1D4A1-304D-4187-8178-6D7C0050B1AF",
"versionEndExcluding": "6.1.39",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A91BC267-63EE-413E-A6EF-6B96C2A278D1",
"versionEndExcluding": "6.4.4",
"versionStartIncluding": "6.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: Fix UAF in svc_tcp_listen_data_ready()\n\nAfter the listener svc_sock is freed, and before invoking svc_tcp_accept()\nfor the established child sock, there is a window that the newsock\nretaining a freed listener svc_sock in sk_user_data which cloning from\nparent. In the race window, if data is received on the newsock, we will\nobserve use-after-free report in svc_tcp_listen_data_ready().\n\nReproduce by two tasks:\n\n1. while :; do rpc.nfsd 0 ; rpc.nfsd; done\n2. while :; do echo \"\" | ncat -4 127.0.0.1 2049 ; done\n\nKASAN report:\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc]\n Read of size 8 at addr ffff888139d96228 by task nc/102553\n CPU: 7 PID: 102553 Comm: nc Not tainted 6.3.0+ #18\n Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020\n Call Trace:\n \u003cIRQ\u003e\n dump_stack_lvl+0x33/0x50\n print_address_description.constprop.0+0x27/0x310\n print_report+0x3e/0x70\n kasan_report+0xae/0xe0\n svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc]\n tcp_data_queue+0x9f4/0x20e0\n tcp_rcv_established+0x666/0x1f60\n tcp_v4_do_rcv+0x51c/0x850\n tcp_v4_rcv+0x23fc/0x2e80\n ip_protocol_deliver_rcu+0x62/0x300\n ip_local_deliver_finish+0x267/0x350\n ip_local_deliver+0x18b/0x2d0\n ip_rcv+0x2fb/0x370\n __netif_receive_skb_one_core+0x166/0x1b0\n process_backlog+0x24c/0x5e0\n __napi_poll+0xa2/0x500\n net_rx_action+0x854/0xc90\n __do_softirq+0x1bb/0x5de\n do_softirq+0xcb/0x100\n \u003c/IRQ\u003e\n \u003cTASK\u003e\n ...\n \u003c/TASK\u003e\n\n Allocated by task 102371:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n __kasan_kmalloc+0x7b/0x90\n svc_setup_socket+0x52/0x4f0 [sunrpc]\n svc_addsock+0x20d/0x400 [sunrpc]\n __write_ports_addfd+0x209/0x390 [nfsd]\n write_ports+0x239/0x2c0 [nfsd]\n nfsctl_transaction_write+0xac/0x110 [nfsd]\n vfs_write+0x1c3/0xae0\n ksys_write+0xed/0x1c0\n do_syscall_64+0x38/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\n Freed by task 102551:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n kasan_save_free_info+0x2a/0x50\n __kasan_slab_free+0x106/0x190\n __kmem_cache_free+0x133/0x270\n svc_xprt_free+0x1e2/0x350 [sunrpc]\n svc_xprt_destroy_all+0x25a/0x440 [sunrpc]\n nfsd_put+0x125/0x240 [nfsd]\n nfsd_svc+0x2cb/0x3c0 [nfsd]\n write_threads+0x1ac/0x2a0 [nfsd]\n nfsctl_transaction_write+0xac/0x110 [nfsd]\n vfs_write+0x1c3/0xae0\n ksys_write+0xed/0x1c0\n do_syscall_64+0x38/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nFix the UAF by simply doing nothing in svc_tcp_listen_data_ready()\nif state != TCP_LISTEN, that will avoid dereferencing svsk for all\nchild socket."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: SUNRPC: corrige UAF en svc_tcp_listen_data_ready() Despu\u00e9s de que se libera el oyente svc_sock, y antes de invocar svc_tcp_accept() para el calcet\u00edn secundario establecido, hay una ventana que indica que el newsock retiene un oyente liberado. svc_sock en sk_user_data que clona desde el padre. En la ventana de ejecuci\u00f3n, si se reciben datos en el newsock, observaremos el informe de use-after-free en svc_tcp_listen_data_ready(). Reproducir mediante dos tareas: 1. while:; hacer rpc.nfsd 0; rpc.nfsd; hecho 2. mientras:; hacer eco \"\" | ncat -4 127.0.0.1 2049; Informe KASAN hecho: ================================================= ==================== ERROR: KASAN: slab-use-after-free en svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff888139d96228 por tarea nc /102553 CPU: 7 PID: 102553 Comm: nc Not tainted 6.3.0+ #18 Nombre de hardware: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 12/11/2020 Seguimiento de llamadas: dump_stack_lvl+ 0x33/0x50 print_address_description.constprop.0+0x27/0x310 print_report+0x3e/0x70 kasan_report+0xae/0xe0 svc_tcp_listen_data_ready+0x1cf/0x1f0 [sunrpc] tcp_data_queue+0x9f4/0x20e0 tcp_rcv_ establecido+0x666/0x1f60 tcp_v4_do_rcv+0x51c/0x850 tcp_v4_rcv+0x23fc/0x2e80 ip_protocol_deliver_rcu+0x62/0x300 ip_local_deliver_finish+0x267/0x350 ip_local_deliver+0x18b/0x2d0 ip_rcv+0x2fb/0x370 __netif_receive_skb_one_core+0x166/0x1b0 Process_backlog+0x24c/0x5e 0 __napi_poll+0xa2/0x500 net_rx_action+0x854/0xc90 __do_softirq+0x1bb/0x5de do_softirq+0xcb/0x100 ... Asignado por la tarea 102371: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0x7b/0x90 svc_setup_socket+0x52/0x4f0 [sunrpc] 0x400 [sunrpc] __write_ports_addfd+0x209/0x390 [nfsd] write_ports+0x239/0x2c0 [nfsd] nfsctl_transaction_write+0xac/0x110 [nfsd] vfs_write+0x1c3/0xae0 ksys_write+0xed/0x1c0 do_syscall_64+0x3 8/0x90 Entry_SYSCALL_64_after_hwframe+0x72/0xdc Liberado por la tarea 102551: kasan_save_stack +0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x50 __kasan_slab_free+0x106/0x190 __kmem_cache_free+0x133/0x270 svc_xprt_free+0x1e2/0x350 [sunrpc] _destroy_all+0x25a/0x440 [sunrpc] nfsd_put+0x125/0x240 [nfsd] nfsd_svc+ 0x2cb/0x3c0 [nfsd] write_threads+0x1ac/0x2a0 [nfsd] nfsctl_transaction_write+0xac/0x110 [nfsd] vfs_write+0x1c3/0xae0 ksys_write+0xed/0x1c0 do_syscall_64+0x38/0x90 entrada_SYSCALL_ 64_after_hwframe+0x72/0xdc Arregle el UAF simplemente sin hacer nada en svc_tcp_listen_data_ready() si state!= TCP_LISTEN, eso evitar\u00e1 desreferenciar svsk para todos los sockets secundarios."
}
],
"id": "CVE-2023-52885",
"lastModified": "2026-08-04T10:18:47.780",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-52885",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-09-10T17:00:55.699629Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-07-14T08:15:01.823",
"references": [
{
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{
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/dfc896c4a75cb8cd7cb2dfd9b469cf1e3f004254"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/ef047411887ff0845afd642d6a687819308e1a4e"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/fbf4ace39b2e4f3833236afbb2336edbafd75eee"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/fc80fc2d4e39137869da3150ee169b40bf879287"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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