{"id":"CVE-2023-54318","title":"net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add\n\nWhile doing smcr_port_add, there maybe linkgroup add into or delete\nfrom smc_lgr_l…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < d1c6c93c27a4bf48006ab16cd9b38d85559d7645","Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < 06b4934ab2b534bb92935c7601852066ebb9eab8","Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < 70c8d17007dc4a07156b7da44509527990e569b3","Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < b717463610a27fc0b58484cfead7a623d5913e61","Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < f5146e3ef0a9eea405874b36178c19a4863b8989","Linux 5.8"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:40:19.800545Z"},"published":"2025-12-30","updated":"2026-10-15","sourceUpdated":"2026-10-15T21:41:44.789Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-54318","references":[{"url":"https://git.kernel.org/stable/c/d1c6c93c27a4bf48006ab16cd9b38d85559d7645"},{"url":"https://git.kernel.org/stable/c/06b4934ab2b534bb92935c7601852066ebb9eab8"},{"url":"https://git.kernel.org/stable/c/70c8d17007dc4a07156b7da44509527990e569b3"},{"url":"https://git.kernel.org/stable/c/b717463610a27fc0b58484cfead7a623d5913e61"},{"url":"https://git.kernel.org/stable/c/f5146e3ef0a9eea405874b36178c19a4863b8989"}],"tags":["cve.org"],"epss":0.00276,"epssPercentile":0.18651,"ingestedAt":"2026-10-15T22:48:25.439Z","slug":"CVE-2023-54318","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add\n\nWhile doing smcr_port_add, there maybe linkgroup add into or delete\nfrom smc_lgr_list.list at the same time, which may result kernel crash.\nSo, use smc_lgr_list.lock to protect smc_lgr_list.list iterate in\nsmcr_port_add.\n\nThe crash calltrace show below:\nBUG: kernel NULL pointer dereference, address: 0000000000000000\nPGD 0 P4D 0\nOops: 0000 [#1] SMP NOPTI\nCPU: 0 PID: 559726 Comm: kworker/0:92 Kdump: loaded Tainted: G\nHardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 449e491 04/01/2014\nWorkqueue: events smc_ib_port_event_work [smc]\nRIP: 0010:smcr_port_add+0xa6/0xf0 [smc]\nRSP: 0000:ffffa5a2c8f67de0 EFLAGS: 00010297\nRAX: 0000000000000001 RBX: ffff9935e0650000 RCX: 0000000000000000\nRDX: 0000000000000010 RSI: ffff9935e0654290 RDI: ffff9935c8560000\nRBP: 0000000000000000 R08: 0000000000000000 R09: ffff9934c0401918\nR10: 0000000000000000 R11: ffffffffb4a5c278 R12: ffff99364029aae4\nR13: ffff99364029aa00 R14: 00000000ffffffed R15: ffff99364029ab08\nFS:  0000000000000000(0000) GS:ffff994380600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000000 CR3: 0000000f06a10003 CR4: 0000000002770ef0\nPKRU: 55555554\nCall Trace:\n smc_ib_port_event_work+0x18f/0x380 [smc]\n process_one_work+0x19b/0x340\n worker_thread+0x30/0x370\n ? process_one_work+0x340/0x340\n kthread+0x114/0x130\n ? __kthread_cancel_work+0x50/0x50\n ret_from_fork+0x1f/0x30\n\n## Affected\n\n- `Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < d1c6c93c27a4bf48006ab16cd9b38d85559d7645`\n- `Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < 06b4934ab2b534bb92935c7601852066ebb9eab8`\n- `Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < 70c8d17007dc4a07156b7da44509527990e569b3`\n- `Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < b717463610a27fc0b58484cfead7a623d5913e61`\n- `Linux >= 1f90a05d9ff907c70456e7c9d7058372679a88c6 < f5146e3ef0a9eea405874b36178c19a4863b8989`\n- `Linux 5.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}