{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47399","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-21T14:58:30.816Z","datePublished":"2024-05-21T15:03:54.714Z","dateUpdated":"2025-05-04T07:10:10.006Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:10:10.006Z"},"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 < 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's how the problem repeats itself:\nSome machine (online cpus < 63), And user set num_queues to 63 through\nethtool. Code is in the \"ixgbe_set_channels\",\n\tadapter->ring_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->num_rx_queues = rss_i;\n\tadapter->num_tx_queues = rss_i;\n\tadapter->num_xdp_queues = ixgbe_xdp_queues(adapter);\n\nAnd rss_i's value is from\n\tf = &adapter->ring_feature[RING_F_FDIR];\n\trss_i = f->indices = f->limit;\n\nSo \"num_rx_queues\" > \"num_xdp_queues\", when run to \"ixgbe_xdp_setup\",\n\tfor (i = 0; i < adapter->num_rx_queues; i++)\n\t\tif (adapter->xdp_ring[i]->xsk_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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c","drivers/net/ethernet/intel/ixgbe/ixgbe_main.c"],"versions":[{"version":"4a9b32f30f805ca596d76605903a48eab58e0b88","lessThan":"20f6c4a31a525edd9ea6243712b868ba0e4e331e","status":"affected","versionType":"git"},{"version":"4a9b32f30f805ca596d76605903a48eab58e0b88","lessThan":"2744341dd52e935344ca1b4bf189ba0d182a3e8e","status":"affected","versionType":"git"},{"version":"4a9b32f30f805ca596d76605903a48eab58e0b88","lessThan":"513e605d7a9ce136886cb42ebb2c40e9a6eb6333","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c","drivers/net/ethernet/intel/ixgbe/ixgbe_main.c"],"versions":[{"version":"5.0","status":"affected"},{"version":"0","lessThan":"5.0","status":"unaffected","versionType":"semver"},{"version":"5.10.71","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.14.10","lessThanOrEqual":"5.14.*","status":"unaffected","versionType":"semver"},{"version":"5.15","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.10.71"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.14.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/20f6c4a31a525edd9ea6243712b868ba0e4e331e"},{"url":"https://git.kernel.org/stable/c/2744341dd52e935344ca1b4bf189ba0d182a3e8e"},{"url":"https://git.kernel.org/stable/c/513e605d7a9ce136886cb42ebb2c40e9a6eb6333"}],"title":"ixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-06-11T17:42:52.728815Z","id":"CVE-2021-47399","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-11T17:43:23.295Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.708Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/20f6c4a31a525edd9ea6243712b868ba0e4e331e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/2744341dd52e935344ca1b4bf189ba0d182a3e8e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/513e605d7a9ce136886cb42ebb2c40e9a6eb6333","tags":["x_transferred"]}]}]}}