CVE-2021-47399 (GCVE-0-2021-47399)
Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2026-05-11 13:53
VLAI
EPSS
VEX
Title
ixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup
Summary
In the Linux kernel, the following vulnerability has been resolved:
ixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup
The ixgbe driver currently generates a NULL pointer dereference with
some machine (online cpus < 63). This is due to the fact that the
maximum value of num_xdp_queues is nr_cpu_ids. Code is in
"ixgbe_set_rss_queues"".
Here's how the problem repeats itself:
Some machine (online cpus < 63), And user set num_queues to 63 through
ethtool. Code is in the "ixgbe_set_channels",
adapter->ring_feature[RING_F_FDIR].limit = count;
It becomes 63.
When user use xdp, "ixgbe_set_rss_queues" will set queues num.
adapter->num_rx_queues = rss_i;
adapter->num_tx_queues = rss_i;
adapter->num_xdp_queues = ixgbe_xdp_queues(adapter);
And rss_i's value is from
f = &adapter->ring_feature[RING_F_FDIR];
rss_i = f->indices = f->limit;
So "num_rx_queues" > "num_xdp_queues", when run to "ixgbe_xdp_setup",
for (i = 0; i < adapter->num_rx_queues; i++)
if (adapter->xdp_ring[i]->xsk_umem)
It leads to panic.
Call trace:
[exception RIP: ixgbe_xdp+368]
RIP: ffffffffc02a76a0 RSP: ffff9fe16202f8d0 RFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000001c RDI: ffffffffa94ead90
RBP: ffff92f8f24c0c18 R8: 0000000000000000 R9: 0000000000000000
R10: ffff9fe16202f830 R11: 0000000000000000 R12: ffff92f8f24c0000
R13: ffff9fe16202fc01 R14: 000000000000000a R15: ffffffffc02a7530
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
7 [ffff9fe16202f8f0] dev_xdp_install at ffffffffa89fbbcc
8 [ffff9fe16202f920] dev_change_xdp_fd at ffffffffa8a08808
9 [ffff9fe16202f960] do_setlink at ffffffffa8a20235
10 [ffff9fe16202fa88] rtnl_setlink at ffffffffa8a20384
11 [ffff9fe16202fc78] rtnetlink_rcv_msg at ffffffffa8a1a8dd
12 [ffff9fe16202fcf0] netlink_rcv_skb at ffffffffa8a717eb
13 [ffff9fe16202fd40] netlink_unicast at ffffffffa8a70f88
14 [ffff9fe16202fd80] netlink_sendmsg at ffffffffa8a71319
15 [ffff9fe16202fdf0] sock_sendmsg at ffffffffa89df290
16 [ffff9fe16202fe08] __sys_sendto at ffffffffa89e19c8
17 [ffff9fe16202ff30] __x64_sys_sendto at ffffffffa89e1a64
18 [ffff9fe16202ff38] do_syscall_64 at ffffffffa84042b9
19 [ffff9fe16202ff50] entry_SYSCALL_64_after_hwframe at ffffffffa8c0008c
So I fix ixgbe_max_channels so that it will not allow a setting of queues
to be higher than the num_online_cpus(). And when run to ixgbe_xdp_setup,
take the smaller value of num_rx_queues and num_xdp_queues.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-11 17:42 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
4a9b32f30f805ca596d76605903a48eab58e0b88 , < 20f6c4a31a525edd9ea6243712b868ba0e4e331e
(git)
Affected: 4a9b32f30f805ca596d76605903a48eab58e0b88 , < 2744341dd52e935344ca1b4bf189ba0d182a3e8e (git) Affected: 4a9b32f30f805ca596d76605903a48eab58e0b88 , < 513e605d7a9ce136886cb42ebb2c40e9a6eb6333 (git) |
guessed | |
| Linux | Linux |
Affected:
5.0
Unaffected: 0 , < 5.0 (semver) Unaffected: 5.10.71 , ≤ 5.10.* (semver) Unaffected: 5.14.10 , ≤ 5.14.* (semver) Unaffected: 5.15 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup\n\nThe ixgbe driver currently generates a NULL pointer dereference with\nsome machine (online cpus \u003c 63). This is due to the fact that the\nmaximum value of num_xdp_queues is nr_cpu_ids. Code is in\n\"ixgbe_set_rss_queues\"\".\n\nHere\u0027s how the problem repeats itself:\nSome machine (online cpus \u003c 63), And user set num_queues to 63 through\nethtool. Code is in the \"ixgbe_set_channels\",\n\tadapter-\u003ering_feature[RING_F_FDIR].limit = count;\n\nIt becomes 63.\n\nWhen user use xdp, \"ixgbe_set_rss_queues\" will set queues num.\n\tadapter-\u003enum_rx_queues = rss_i;\n\tadapter-\u003enum_tx_queues = rss_i;\n\tadapter-\u003enum_xdp_queues = ixgbe_xdp_queues(adapter);\n\nAnd rss_i\u0027s value is from\n\tf = \u0026adapter-\u003ering_feature[RING_F_FDIR];\n\trss_i = f-\u003eindices = f-\u003elimit;\n\nSo \"num_rx_queues\" \u003e \"num_xdp_queues\", when run to \"ixgbe_xdp_setup\",\n\tfor (i = 0; i \u003c adapter-\u003enum_rx_queues; i++)\n\t\tif (adapter-\u003exdp_ring[i]-\u003exsk_umem)\n\nIt leads to panic.\n\nCall trace:\n[exception RIP: ixgbe_xdp+368]\nRIP: ffffffffc02a76a0 RSP: ffff9fe16202f8d0 RFLAGS: 00010297\nRAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: 000000000000001c RDI: ffffffffa94ead90\nRBP: ffff92f8f24c0c18 R8: 0000000000000000 R9: 0000000000000000\nR10: ffff9fe16202f830 R11: 0000000000000000 R12: ffff92f8f24c0000\nR13: ffff9fe16202fc01 R14: 000000000000000a R15: ffffffffc02a7530\nORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\n 7 [ffff9fe16202f8f0] dev_xdp_install at ffffffffa89fbbcc\n 8 [ffff9fe16202f920] dev_change_xdp_fd at ffffffffa8a08808\n 9 [ffff9fe16202f960] do_setlink at ffffffffa8a20235\n10 [ffff9fe16202fa88] rtnl_setlink at ffffffffa8a20384\n11 [ffff9fe16202fc78] rtnetlink_rcv_msg at ffffffffa8a1a8dd\n12 [ffff9fe16202fcf0] netlink_rcv_skb at ffffffffa8a717eb\n13 [ffff9fe16202fd40] netlink_unicast at ffffffffa8a70f88\n14 [ffff9fe16202fd80] netlink_sendmsg at ffffffffa8a71319\n15 [ffff9fe16202fdf0] sock_sendmsg at ffffffffa89df290\n16 [ffff9fe16202fe08] __sys_sendto at ffffffffa89e19c8\n17 [ffff9fe16202ff30] __x64_sys_sendto at ffffffffa89e1a64\n18 [ffff9fe16202ff38] do_syscall_64 at ffffffffa84042b9\n19 [ffff9fe16202ff50] entry_SYSCALL_64_after_hwframe at ffffffffa8c0008c\n\nSo I fix ixgbe_max_channels so that it will not allow a setting of queues\nto be higher than the num_online_cpus(). And when run to ixgbe_xdp_setup,\ntake the smaller value of num_rx_queues and num_xdp_queues."
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Code is in the \\\"ixgbe_set_channels\\\",\\n\\tadapter-\u003ering_feature[RING_F_FDIR].limit = count;\\n\\nIt becomes 63.\\n\\nWhen user use xdp, \\\"ixgbe_set_rss_queues\\\" will set queues num.\\n\\tadapter-\u003enum_rx_queues = rss_i;\\n\\tadapter-\u003enum_tx_queues = rss_i;\\n\\tadapter-\u003enum_xdp_queues = ixgbe_xdp_queues(adapter);\\n\\nAnd rss_i\u0027s value is from\\n\\tf = \u0026adapter-\u003ering_feature[RING_F_FDIR];\\n\\trss_i = f-\u003eindices = f-\u003elimit;\\n\\nSo \\\"num_rx_queues\\\" \u003e \\\"num_xdp_queues\\\", when run to \\\"ixgbe_xdp_setup\\\",\\n\\tfor (i = 0; i \u003c adapter-\u003enum_rx_queues; i++)\\n\\t\\tif (adapter-\u003exdp_ring[i]-\u003exsk_umem)\\n\\nIt leads to panic.\\n\\nCall trace:\\n[exception RIP: ixgbe_xdp+368]\\nRIP: ffffffffc02a76a0 RSP: ffff9fe16202f8d0 RFLAGS: 00010297\\nRAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000000000\\nRDX: 0000000000000000 RSI: 000000000000001c RDI: ffffffffa94ead90\\nRBP: ffff92f8f24c0c18 R8: 0000000000000000 R9: 0000000000000000\\nR10: ffff9fe16202f830 R11: 0000000000000000 R12: ffff92f8f24c0000\\nR13: ffff9fe16202fc01 R14: 000000000000000a R15: ffffffffc02a7530\\nORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\\n 7 [ffff9fe16202f8f0] dev_xdp_install at ffffffffa89fbbcc\\n 8 [ffff9fe16202f920] dev_change_xdp_fd at ffffffffa8a08808\\n 9 [ffff9fe16202f960] do_setlink at ffffffffa8a20235\\n10 [ffff9fe16202fa88] rtnl_setlink at ffffffffa8a20384\\n11 [ffff9fe16202fc78] rtnetlink_rcv_msg at ffffffffa8a1a8dd\\n12 [ffff9fe16202fcf0] netlink_rcv_skb at ffffffffa8a717eb\\n13 [ffff9fe16202fd40] netlink_unicast at ffffffffa8a70f88\\n14 [ffff9fe16202fd80] netlink_sendmsg at ffffffffa8a71319\\n15 [ffff9fe16202fdf0] sock_sendmsg at ffffffffa89df290\\n16 [ffff9fe16202fe08] __sys_sendto at ffffffffa89e19c8\\n17 [ffff9fe16202ff30] __x64_sys_sendto at ffffffffa89e1a64\\n18 [ffff9fe16202ff38] do_syscall_64 at ffffffffa84042b9\\n19 [ffff9fe16202ff50] entry_SYSCALL_64_after_hwframe at ffffffffa8c0008c\\n\\nSo I fix ixgbe_max_channels so that it will not allow a setting of queues\\nto be higher than the num_online_cpus(). And when run to ixgbe_xdp_setup,\\ntake the smaller value of num_rx_queues and num_xdp_queues.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: ixgbe: corrige la desreferencia del puntero NULL en ixgbe_xdp_setup. El controlador ixgbe actualmente genera una desreferencia del puntero NULL con alguna m\\u00e1quina (cpus en l\\u00ednea \u0026lt;63). Esto se debe al hecho de que el valor m\\u00e1ximo de num_xdp_queues es nr_cpu_ids. El c\\u00f3digo est\\u00e1 en \\\"ixgbe_set_rss_queues\\\"\\\". As\\u00ed es como el problema se repite: alguna m\\u00e1quina (cpus en l\\u00ednea \u0026lt;63), y el usuario configur\\u00f3 num_queues en 63 a trav\\u00e9s de ethtool. El c\\u00f3digo est\\u00e1 en \\\"ixgbe_set_channels\\\", adaptador-\u0026gt;ring_feature[RING_F_FDIR].limit = count; se convierte en 63. Cuando el usuario usa xdp, \\\"ixgbe_set_rss_queues\\\" establecer\\u00e1 el n\\u00famero de colas adaptor-\u0026gt;num_rx_queues = rss_i; = \u0026amp;adapter-\u0026gt;ring_feature[RING_F_FDIR]; rss_i = f-\u0026gt;indices = f-\u0026gt;limit; Entonces \\\"num_rx_queues\\\" \u0026gt; \\\"num_xdp_queues\\\", cuando se ejecuta en \\\"ixgbe_xdp_setup\\\", para (i = 0; i \u0026lt; adaptor-\u0026gt;num_rx_queues; i++) if (adapter-\u0026gt;xdp_ring[i]-\u0026gt;xsk_umem) Genera p\\u00e1nico: [excepci\\u00f3n RIP: ixgbe_xdp+368] RIP: ffffffffc02a76a0 RSP: ffff9fe16202f8d0 RFLAGS: 00010297 RAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000000000 RDX : 0000000000000000 RSI: 000000000000001c RDI: ffffffffa94ead90 RBP: ffff92f8f24c0c18 R8: 0000000000000000 R9: 0000000000000000 R10: ffff9fe1620 2f830 R11: 0000000000000000 R12: ffff92f8f24c0000 R13: ffff9fe16202fc01 R14: 000000000000000a R15: ffffffffc02a7530 ORIG_RAX: ffffffffffffffff CS: : 0018 7 [ffff9fe16202f8f0] dev_xdp_install en fffffffa89fbbcc 8 [ffff9fe16202f920] dev_change_xdp_fd en fffffffa8a08808 9 [ffff9fe16202f960] do_setlink en fffffffa8a20235 10 [ffff9fe16202fa88] rtnl_setlink en fffffffa8a20384 11 [ffff9fe16202fc78] rtnetlink_rcv_msg en ffffffffa8a1a8dd 12 [ffff9fe16202fcf0] netlink_rcv_skb en ffffffffa8a717eb 13 [ffff9fe16202fd40] netlink_unicast en fffffffa8a70f88 14 [ffff9fe162 02fd80] netlink_sendmsg en fffffffa8a71319 15 [ffff9fe16202fdf0] sock_sendmsg en ffffffffa89df290 16 [ffff9fe16202fe08] __sys_sendto en ffffffffa89e19c8 17 [ffff9fe16202ff30] __x64_sys_sendto en ffffffffa89e1a64 8 [ffff9fe16202ff38] do_syscall_64 en ffffffffa84042b9 19 [ffff9fe16202ff50] Entry_SYSCALL_64_after_hwframe en ffffffffa8c0008c Entonces arreglo ixgbe_max_channels para que no permita una configuraci\\u00f3n de colas ser mayor que num_online_cpus(). Y cuando ejecute ixgbe_xdp_setup, tome el valor m\\u00e1s peque\\u00f1o de num_rx_queues y num_xdp_queues.\"}]",
"id": "CVE-2021-47399",
"lastModified": "2024-12-24T16:06:15.200",
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"published": "2024-05-21T15:15:25.360",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
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"nvd": "{\"cve\":{\"id\":\"CVE-2021-47399\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:25.360\",\"lastModified\":\"2026-06-17T04:17:22.880\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup\\n\\nThe ixgbe driver currently generates a NULL pointer dereference with\\nsome machine (online cpus \u003c 63). This is due to the fact that the\\nmaximum value of num_xdp_queues is nr_cpu_ids. Code is in\\n\\\"ixgbe_set_rss_queues\\\"\\\".\\n\\nHere\u0027s how the problem repeats itself:\\nSome machine (online cpus \u003c 63), And user set num_queues to 63 through\\nethtool. Code is in the \\\"ixgbe_set_channels\\\",\\n\\tadapter-\u003ering_feature[RING_F_FDIR].limit = count;\\n\\nIt becomes 63.\\n\\nWhen user use xdp, \\\"ixgbe_set_rss_queues\\\" will set queues num.\\n\\tadapter-\u003enum_rx_queues = rss_i;\\n\\tadapter-\u003enum_tx_queues = rss_i;\\n\\tadapter-\u003enum_xdp_queues = ixgbe_xdp_queues(adapter);\\n\\nAnd rss_i\u0027s value is from\\n\\tf = \u0026adapter-\u003ering_feature[RING_F_FDIR];\\n\\trss_i = f-\u003eindices = f-\u003elimit;\\n\\nSo \\\"num_rx_queues\\\" \u003e \\\"num_xdp_queues\\\", when run to \\\"ixgbe_xdp_setup\\\",\\n\\tfor (i = 0; i \u003c adapter-\u003enum_rx_queues; i++)\\n\\t\\tif (adapter-\u003exdp_ring[i]-\u003exsk_umem)\\n\\nIt leads to panic.\\n\\nCall trace:\\n[exception RIP: ixgbe_xdp+368]\\nRIP: ffffffffc02a76a0 RSP: ffff9fe16202f8d0 RFLAGS: 00010297\\nRAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000000000\\nRDX: 0000000000000000 RSI: 000000000000001c RDI: ffffffffa94ead90\\nRBP: ffff92f8f24c0c18 R8: 0000000000000000 R9: 0000000000000000\\nR10: ffff9fe16202f830 R11: 0000000000000000 R12: ffff92f8f24c0000\\nR13: ffff9fe16202fc01 R14: 000000000000000a R15: ffffffffc02a7530\\nORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\\n 7 [ffff9fe16202f8f0] dev_xdp_install at ffffffffa89fbbcc\\n 8 [ffff9fe16202f920] dev_change_xdp_fd at ffffffffa8a08808\\n 9 [ffff9fe16202f960] do_setlink at ffffffffa8a20235\\n10 [ffff9fe16202fa88] rtnl_setlink at ffffffffa8a20384\\n11 [ffff9fe16202fc78] rtnetlink_rcv_msg at ffffffffa8a1a8dd\\n12 [ffff9fe16202fcf0] netlink_rcv_skb at ffffffffa8a717eb\\n13 [ffff9fe16202fd40] netlink_unicast at ffffffffa8a70f88\\n14 [ffff9fe16202fd80] netlink_sendmsg at ffffffffa8a71319\\n15 [ffff9fe16202fdf0] sock_sendmsg at ffffffffa89df290\\n16 [ffff9fe16202fe08] __sys_sendto at ffffffffa89e19c8\\n17 [ffff9fe16202ff30] __x64_sys_sendto at ffffffffa89e1a64\\n18 [ffff9fe16202ff38] do_syscall_64 at ffffffffa84042b9\\n19 [ffff9fe16202ff50] entry_SYSCALL_64_after_hwframe at ffffffffa8c0008c\\n\\nSo I fix ixgbe_max_channels so that it will not allow a setting of queues\\nto be higher than the num_online_cpus(). And when run to ixgbe_xdp_setup,\\ntake the smaller value of num_rx_queues and num_xdp_queues.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ixgbe: corrige la desreferencia del puntero NULL en ixgbe_xdp_setup. El controlador ixgbe actualmente genera una desreferencia del puntero NULL con alguna m\u00e1quina (cpus en l\u00ednea \u0026lt;63). Esto se debe al hecho de que el valor m\u00e1ximo de num_xdp_queues es nr_cpu_ids. El c\u00f3digo est\u00e1 en \\\"ixgbe_set_rss_queues\\\"\\\". As\u00ed es como el problema se repite: alguna m\u00e1quina (cpus en l\u00ednea \u0026lt;63), y el usuario configur\u00f3 num_queues en 63 a trav\u00e9s de ethtool. El c\u00f3digo est\u00e1 en \\\"ixgbe_set_channels\\\", adaptador-\u0026gt;ring_feature[RING_F_FDIR].limit = count; se convierte en 63. Cuando el usuario usa xdp, \\\"ixgbe_set_rss_queues\\\" establecer\u00e1 el n\u00famero de colas adaptor-\u0026gt;num_rx_queues = rss_i; = \u0026amp;adapter-\u0026gt;ring_feature[RING_F_FDIR]; rss_i = f-\u0026gt;indices = f-\u0026gt;limit; Entonces \\\"num_rx_queues\\\" \u0026gt; \\\"num_xdp_queues\\\", cuando se ejecuta en \\\"ixgbe_xdp_setup\\\", para (i = 0; i \u0026lt; adaptor-\u0026gt;num_rx_queues; i++) if (adapter-\u0026gt;xdp_ring[i]-\u0026gt;xsk_umem) Genera p\u00e1nico: [excepci\u00f3n RIP: ixgbe_xdp+368] RIP: ffffffffc02a76a0 RSP: ffff9fe16202f8d0 RFLAGS: 00010297 RAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000000000 RDX : 0000000000000000 RSI: 000000000000001c RDI: ffffffffa94ead90 RBP: ffff92f8f24c0c18 R8: 0000000000000000 R9: 0000000000000000 R10: ffff9fe1620 2f830 R11: 0000000000000000 R12: ffff92f8f24c0000 R13: ffff9fe16202fc01 R14: 000000000000000a R15: ffffffffc02a7530 ORIG_RAX: ffffffffffffffff CS: : 0018 7 [ffff9fe16202f8f0] dev_xdp_install en fffffffa89fbbcc 8 [ffff9fe16202f920] dev_change_xdp_fd en fffffffa8a08808 9 [ffff9fe16202f960] do_setlink en fffffffa8a20235 10 [ffff9fe16202fa88] rtnl_setlink en fffffffa8a20384 11 [ffff9fe16202fc78] rtnetlink_rcv_msg en ffffffffa8a1a8dd 12 [ffff9fe16202fcf0] netlink_rcv_skb en ffffffffa8a717eb 13 [ffff9fe16202fd40] netlink_unicast en fffffffa8a70f88 14 [ffff9fe162 02fd80] netlink_sendmsg en fffffffa8a71319 15 [ffff9fe16202fdf0] sock_sendmsg en ffffffffa89df290 16 [ffff9fe16202fe08] __sys_sendto en ffffffffa89e19c8 17 [ffff9fe16202ff30] __x64_sys_sendto en ffffffffa89e1a64 8 [ffff9fe16202ff38] do_syscall_64 en ffffffffa84042b9 19 [ffff9fe16202ff50] Entry_SYSCALL_64_after_hwframe en ffffffffa8c0008c Entonces arreglo ixgbe_max_channels para que no permita una configuraci\u00f3n de colas ser mayor que num_online_cpus(). Y cuando ejecute ixgbe_xdp_setup, tome el valor m\u00e1s peque\u00f1o de num_rx_queues y num_xdp_queues.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c\",\"drivers/net/ethernet/intel/ixgbe/ixgbe_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4a9b32f30f805ca596d76605903a48eab58e0b88\",\"lessThan\":\"20f6c4a31a525edd9ea6243712b868ba0e4e331e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a9b32f30f805ca596d76605903a48eab58e0b88\",\"lessThan\":\"2744341dd52e935344ca1b4bf189ba0d182a3e8e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a9b32f30f805ca596d76605903a48eab58e0b88\",\"lessThan\":\"513e605d7a9ce136886cb42ebb2c40e9a6eb6333\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c\",\"drivers/net/ethernet/intel/ixgbe/ixgbe_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.71\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.14.10\",\"lessThanOrEqual\":\"5.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-06-11T17:42:52.728815Z\",\"id\":\"CVE-2021-47399\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.0\",\"versionEndExcluding\":\"5.10.71\",\"matchCriteriaId\":\"B3E98F08-3632-4238-B6F6-37C8940E21A1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.14.10\",\"matchCriteriaId\":\"1A437B0D-8305-4C72-B691-D26986A126CF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E46C74C6-B76B-4C94-A6A4-FD2FFF62D644\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"60134C3A-06E4-48C1-B04F-2903732A4E56\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"0460DA88-8FE1-46A2-9DDA-1F1ABA552E71\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20f6c4a31a525edd9ea6243712b868ba0e4e331e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2744341dd52e935344ca1b4bf189ba0d182a3e8e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/513e605d7a9ce136886cb42ebb2c40e9a6eb6333\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/20f6c4a31a525edd9ea6243712b868ba0e4e331e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2744341dd52e935344ca1b4bf189ba0d182a3e8e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/513e605d7a9ce136886cb42ebb2c40e9a6eb6333\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-02-02T10:52:04+00:00",
"cve": "CVE-2021-47399",
"id": "CVE-2021-47399",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_affected": "44",
"product_status:known_not_affected": "154",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: ixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47399.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-02T12:46:45Z",
"cve": "CVE-2021-47399",
"id": "CVE-2021-47399",
"initial_release_date": "2024-05-28T03:34:15Z",
"product_status:known_affected": "303",
"product_status:known_not_affected": "139",
"product_status:recommended": "657",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-47399",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47399.json",
"version": "58"
},
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This is due to the fact that the\\nmaximum value of num_xdp_queues is nr_cpu_ids. Code is in\\n\\\"ixgbe_set_rss_queues\\\"\\\".\\n\\nHere\u0027s how the problem repeats itself:\\nSome machine (online cpus \u003c 63), And user set num_queues to 63 through\\nethtool. Code is in the \\\"ixgbe_set_channels\\\",\\n\\tadapter-\u003ering_feature[RING_F_FDIR].limit = count;\\n\\nIt becomes 63.\\n\\nWhen user use xdp, \\\"ixgbe_set_rss_queues\\\" will set queues num.\\n\\tadapter-\u003enum_rx_queues = rss_i;\\n\\tadapter-\u003enum_tx_queues = rss_i;\\n\\tadapter-\u003enum_xdp_queues = ixgbe_xdp_queues(adapter);\\n\\nAnd rss_i\u0027s value is from\\n\\tf = \u0026adapter-\u003ering_feature[RING_F_FDIR];\\n\\trss_i = f-\u003eindices = f-\u003elimit;\\n\\nSo \\\"num_rx_queues\\\" \u003e \\\"num_xdp_queues\\\", when run to \\\"ixgbe_xdp_setup\\\",\\n\\tfor (i = 0; i \u003c adapter-\u003enum_rx_queues; i++)\\n\\t\\tif (adapter-\u003exdp_ring[i]-\u003exsk_umem)\\n\\nIt leads to panic.\\n\\nCall trace:\\n[exception RIP: ixgbe_xdp+368]\\nRIP: ffffffffc02a76a0 RSP: ffff9fe16202f8d0 RFLAGS: 00010297\\nRAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000000000\\nRDX: 0000000000000000 RSI: 000000000000001c RDI: ffffffffa94ead90\\nRBP: ffff92f8f24c0c18 R8: 0000000000000000 R9: 0000000000000000\\nR10: ffff9fe16202f830 R11: 0000000000000000 R12: ffff92f8f24c0000\\nR13: ffff9fe16202fc01 R14: 000000000000000a R15: ffffffffc02a7530\\nORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\\n 7 [ffff9fe16202f8f0] dev_xdp_install at ffffffffa89fbbcc\\n 8 [ffff9fe16202f920] dev_change_xdp_fd at ffffffffa8a08808\\n 9 [ffff9fe16202f960] do_setlink at ffffffffa8a20235\\n10 [ffff9fe16202fa88] rtnl_setlink at ffffffffa8a20384\\n11 [ffff9fe16202fc78] rtnetlink_rcv_msg at ffffffffa8a1a8dd\\n12 [ffff9fe16202fcf0] netlink_rcv_skb at ffffffffa8a717eb\\n13 [ffff9fe16202fd40] netlink_unicast at ffffffffa8a70f88\\n14 [ffff9fe16202fd80] netlink_sendmsg at ffffffffa8a71319\\n15 [ffff9fe16202fdf0] sock_sendmsg at ffffffffa89df290\\n16 [ffff9fe16202fe08] __sys_sendto at ffffffffa89e19c8\\n17 [ffff9fe16202ff30] __x64_sys_sendto at ffffffffa89e1a64\\n18 [ffff9fe16202ff38] do_syscall_64 at ffffffffa84042b9\\n19 [ffff9fe16202ff50] entry_SYSCALL_64_after_hwframe at ffffffffa8c0008c\\n\\nSo I fix ixgbe_max_channels so that it will not allow a setting of queues\\nto be higher than the num_online_cpus(). And when run to ixgbe_xdp_setup,\\ntake the smaller value of num_rx_queues and num_xdp_queues.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.71\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.10\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15\", \"versionStartIncluding\": \"5.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:10:10.006Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-47399\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:10:10.006Z\", \"dateReserved\": \"2024-05-21T14:58:30.816Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:03:54.714Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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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