CVE-2023-54004
Estado: AplazadaAlta (7.5)—
In the Linux kernel, the following vulnerability has been resolved:
udplite: Fix NULL pointer dereference in __sk_mem_raise_allocated().
syzbot reported [0] a null-ptr-deref in sk_get_rmem0() while using IPPROTO_UDPLITE (0x88):
We had a similar report [1] for probably sk_memory_allocated_add() in __sk_mem_raise_allocated(), and commit c915fe13cbaa ("udplite: fix NULL pointer dereference") fixed it by setting .memory_allocated for udplite_prot and udplitev6_prot.
To fix the variant, we need to set either .sysctl_wmem_offset or .sysctl_rmem.
Now UDP and UDPLITE share the same value for .memory_allocated, so we use the same .sysctl_wmem_offset for UDP and UDPLITE.
Detalles técnicos trazas, registros y código del informe original
14:25:52 executing program 1: r0 = socket$inet6(0xa, 0x80002, 0x88) [0]: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 6829 Comm: syz-executor.1 Not tainted 6.4.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:sk_get_rmem0 include/net/sock.h:2907 [inline] RIP: 0010:__sk_mem_raise_allocated+0x806/0x17a0 net/core/sock.c:3006 Code: c1 ea 03 80 3c 02 00 0f 85 23 0f 00 00 48 8b 44 24 08 48 8b 98 38 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 0f 8d 6f 0a 00 00 8b RSP: 0018:ffffc90005d7f450 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90004d92000 RDX: 0000000000000000 RSI: ffffffff88066482 RDI: ffffffff8e2ccbb8 RBP: ffff8880173f7000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000030000 R13: 0000000000000001 R14: 0000000000000340 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9800000(0063) knlGS:00000000f7f1cb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002e82f000 CR3: 0000000034ff0000 CR4: 00000000003506f0 Call Trace: <TASK> __sk_mem_schedule+0x6c/0xe0 net/core/sock.c:3077 udp_rmem_schedule net/ipv4/udp.c:1539 [inline] __udp_enqueue_schedule_skb+0x776/0xb30 net/ipv4/udp.c:1581 __udpv6_queue_rcv_skb net/ipv6/udp.c:666 [inline] udpv6_queue_rcv_one_skb+0xc39/0x16c0 net/ipv6/udp.c:775 udpv6_queue_rcv_skb+0x194/0xa10 net/ipv6/udp.c:793 __udp6_lib_mcast_deliver net/ipv6/udp.c:906 [inline] __udp6_lib_rcv+0x1bda/0x2bd0 net/ipv6/udp.c:1013 ip6_protocol_deliver_rcu+0x2e7/0x1250 net/ipv6/ip6_input.c:437 ip6_input_finish+0x150/0x2f0 net/ipv6/ip6_input.c:482 NF_HOOK include/linux/netfilter.h:303 [inline] NF_HOOK include/linux/netfilter.h:297 [inline] ip6_input+0xa0/0xd0 net/ipv6/ip6_input.c:491 ip6_mc_input+0x40b/0xf50 net/ipv6/ip6_input.c:585 dst_input include/net/dst.h:468 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] NF_HOOK include/linux/netfilter.h:297 [inline] ipv6_rcv+0x250/0x380 net/ipv6/ip6_input.c:309 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5491 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605 netif_receive_skb_internal net/core/dev.c:5691 [inline] netif_receive_skb+0x133/0x7a0 net/core/dev.c:5750 tun_rx_batched+0x4b3/0x7a0 drivers/net/tun.c:1553 tun_get_user+0x2452/0x39c0 drivers/net/tun.c:1989 tun_chr_write_iter+0xdf/0x200 drivers/net/tun.c:2035 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x945/0xd50 fs/read_write.c:584 ksys_write+0x12b/0x250 fs/read_write.c:637 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f21579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 ---truncated---
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.59%
- Percentil entre todas las CVEs puntuadas: 46
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access45 % - Impacto principal
T1499.004Application or System Exploitationimpact75 %
NULL pointer dereference en kernel Linux remoto (AV:N, sin autenticación) causa DoS via crash; explotación local o red requiere claridad mayor en vector.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/2a112f04629f7839e7cb509b27b8d3b735afe255
- https://git.kernel.org/stable/c/387bd0a3af3bdd2b16f8dbef0c9fcccac63000a4
- https://git.kernel.org/stable/c/5014b64e369bdf997935b132a1ac4d64b6e47ad4
- https://git.kernel.org/stable/c/7e3ae83371a4809da6fa3f10ccc430eecef3034a
- https://git.kernel.org/stable/c/ad42a35bdfc6d3c0fc4cb4027d7b2757ce665665
- https://git.kernel.org/stable/c/cc56de054d828935aa37734b479f82fa34b5f9bd
- https://git.kernel.org/stable/c/f04c8eaf45e7dcdfccba936506b1ec592a369fb9
JSON original (NVD)
Mostrar
{
"id": "CVE-2023-54004",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9",
"lessThan": "cc56de054d828935aa37734b479f82fa34b5f9bd",
"versionType": "git"
},
{
"status": "affected",
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"lessThan": "7e3ae83371a4809da6fa3f10ccc430eecef3034a",
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{
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"versionType": "git"
},
{
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"versionType": "git"
},
{
"status": "affected",
"version": "850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9",
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"versionType": "git"
},
{
"status": "affected",
"version": "850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9",
"lessThan": "f04c8eaf45e7dcdfccba936506b1ec592a369fb9",
"versionType": "git"
},
{
"status": "affected",
"version": "850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9",
"lessThan": "ad42a35bdfc6d3c0fc4cb4027d7b2757ce665665",
"versionType": "git"
}
],
"programFiles": [
"net/ipv4/udplite.c",
"net/ipv6/udplite.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.284",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.244",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.181",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.114",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.31",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.3.5",
"versionType": "semver",
"lessThanOrEqual": "6.3.*"
},
{
"status": "unaffected",
"version": "6.4",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/udplite.c",
"net/ipv6/udplite.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-24T11:15:53.320",
"references": [
{
"url": "https://git.kernel.org/stable/c/2a112f04629f7839e7cb509b27b8d3b735afe255",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/387bd0a3af3bdd2b16f8dbef0c9fcccac63000a4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5014b64e369bdf997935b132a1ac4d64b6e47ad4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7e3ae83371a4809da6fa3f10ccc430eecef3034a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ad42a35bdfc6d3c0fc4cb4027d7b2757ce665665",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cc56de054d828935aa37734b479f82fa34b5f9bd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f04c8eaf45e7dcdfccba936506b1ec592a369fb9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudplite: Fix NULL pointer dereference in __sk_mem_raise_allocated().\n\nsyzbot reported [0] a null-ptr-deref in sk_get_rmem0() while using\nIPPROTO_UDPLITE (0x88):\n\n 14:25:52 executing program 1:\n r0 = socket$inet6(0xa, 0x80002, 0x88)\n\nWe had a similar report [1] for probably sk_memory_allocated_add()\nin __sk_mem_raise_allocated(), and commit c915fe13cbaa (\"udplite: fix\nNULL pointer dereference\") fixed it by setting .memory_allocated for\nudplite_prot and udplitev6_prot.\n\nTo fix the variant, we need to set either .sysctl_wmem_offset or\n.sysctl_rmem.\n\nNow UDP and UDPLITE share the same value for .memory_allocated, so we\nuse the same .sysctl_wmem_offset for UDP and UDPLITE.\n\n[0]:\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 0 PID: 6829 Comm: syz-executor.1 Not tainted 6.4.0-rc2-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023\nRIP: 0010:sk_get_rmem0 include/net/sock.h:2907 [inline]\nRIP: 0010:__sk_mem_raise_allocated+0x806/0x17a0 net/core/sock.c:3006\nCode: c1 ea 03 80 3c 02 00 0f 85 23 0f 00 00 48 8b 44 24 08 48 8b 98 38 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 0f 8d 6f 0a 00 00 8b\nRSP: 0018:ffffc90005d7f450 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90004d92000\nRDX: 0000000000000000 RSI: ffffffff88066482 RDI: ffffffff8e2ccbb8\nRBP: ffff8880173f7000 R08: 0000000000000005 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000000 R12: 0000000000030000\nR13: 0000000000000001 R14: 0000000000000340 R15: 0000000000000001\nFS: 0000000000000000(0000) GS:ffff8880b9800000(0063) knlGS:00000000f7f1cb40\nCS: 0010 DS: 002b ES: 002b CR0: 0000000080050033\nCR2: 000000002e82f000 CR3: 0000000034ff0000 CR4: 00000000003506f0\nCall Trace:\n <TASK>\n __sk_mem_schedule+0x6c/0xe0 net/core/sock.c:3077\n udp_rmem_schedule net/ipv4/udp.c:1539 [inline]\n __udp_enqueue_schedule_skb+0x776/0xb30 net/ipv4/udp.c:1581\n __udpv6_queue_rcv_skb net/ipv6/udp.c:666 [inline]\n udpv6_queue_rcv_one_skb+0xc39/0x16c0 net/ipv6/udp.c:775\n udpv6_queue_rcv_skb+0x194/0xa10 net/ipv6/udp.c:793\n __udp6_lib_mcast_deliver net/ipv6/udp.c:906 [inline]\n __udp6_lib_rcv+0x1bda/0x2bd0 net/ipv6/udp.c:1013\n ip6_protocol_deliver_rcu+0x2e7/0x1250 net/ipv6/ip6_input.c:437\n ip6_input_finish+0x150/0x2f0 net/ipv6/ip6_input.c:482\n NF_HOOK include/linux/netfilter.h:303 [inline]\n NF_HOOK include/linux/netfilter.h:297 [inline]\n ip6_input+0xa0/0xd0 net/ipv6/ip6_input.c:491\n ip6_mc_input+0x40b/0xf50 net/ipv6/ip6_input.c:585\n dst_input include/net/dst.h:468 [inline]\n ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]\n NF_HOOK include/linux/netfilter.h:303 [inline]\n NF_HOOK include/linux/netfilter.h:297 [inline]\n ipv6_rcv+0x250/0x380 net/ipv6/ip6_input.c:309\n __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5491\n __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605\n netif_receive_skb_internal net/core/dev.c:5691 [inline]\n netif_receive_skb+0x133/0x7a0 net/core/dev.c:5750\n tun_rx_batched+0x4b3/0x7a0 drivers/net/tun.c:1553\n tun_get_user+0x2452/0x39c0 drivers/net/tun.c:1989\n tun_chr_write_iter+0xdf/0x200 drivers/net/tun.c:2035\n call_write_iter include/linux/fs.h:1868 [inline]\n new_sync_write fs/read_write.c:491 [inline]\n vfs_write+0x945/0xd50 fs/read_write.c:584\n ksys_write+0x12b/0x250 fs/read_write.c:637\n do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]\n __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178\n do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203\n entry_SYSENTER_compat_after_hwframe+0x70/0x82\nRIP: 0023:0xf7f21579\nCode: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00\n---truncated---"
}
],
"lastModified": "2026-08-04T10:19:25.330",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}