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CVE-2023-54318 (GCVE-0-2023-54318)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:23 – Updated: 2026-08-05 09:19
VLAI
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: net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add While doing smcr_port_add, there maybe linkgroup add into or delete from smc_lgr_list.list at the same time, which may result kernel crash. So, use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add. The crash calltrace show below: BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: 0000 [#1] SMP NOPTI CPU: 0 PID: 559726 Comm: kworker/0:92 Kdump: loaded Tainted: G Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 449e491 04/01/2014 Workqueue: events smc_ib_port_event_work [smc] RIP: 0010:smcr_port_add+0xa6/0xf0 [smc] RSP: 0000:ffffa5a2c8f67de0 EFLAGS: 00010297 RAX: 0000000000000001 RBX: ffff9935e0650000 RCX: 0000000000000000 RDX: 0000000000000010 RSI: ffff9935e0654290 RDI: ffff9935c8560000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff9934c0401918 R10: 0000000000000000 R11: ffffffffb4a5c278 R12: ffff99364029aae4 R13: ffff99364029aa00 R14: 00000000ffffffed R15: ffff99364029ab08 FS: 0000000000000000(0000) GS:ffff994380600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000f06a10003 CR4: 0000000002770ef0 PKRU: 55555554 Call Trace: smc_ib_port_event_work+0x18f/0x380 [smc] process_one_work+0x19b/0x340 worker_thread+0x30/0x370 ? process_one_work+0x340/0x340 kthread+0x114/0x130 ? __kthread_cancel_work+0x50/0x50 ret_from_fork+0x1f/0x30
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1f90a05d9ff907c70456e7c9d7058372679a88c6 , < d1c6c93c27a4bf48006ab16cd9b38d85559d7645 (git)
Affected: 1f90a05d9ff907c70456e7c9d7058372679a88c6 , < 06b4934ab2b534bb92935c7601852066ebb9eab8 (git)
Affected: 1f90a05d9ff907c70456e7c9d7058372679a88c6 , < 70c8d17007dc4a07156b7da44509527990e569b3 (git)
Affected: 1f90a05d9ff907c70456e7c9d7058372679a88c6 , < b717463610a27fc0b58484cfead7a623d5913e61 (git)
Affected: 1f90a05d9ff907c70456e7c9d7058372679a88c6 , < f5146e3ef0a9eea405874b36178c19a4863b8989 (git)
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Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.195 , ≤ 5.10.* (semver)
Unaffected: 5.15.132 , ≤ 5.15.* (semver)
Unaffected: 6.1.54 , ≤ 6.1.* (semver)
Unaffected: 6.5.4 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/smc/smc_core.c"
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
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              "versionType": "semver"
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              "version": "6.5.4",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
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        }
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      "cpeApplicability": [
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          "nodes": [
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                  "versionEndExcluding": "5.15.132",
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                  "vulnerable": true
                },
                {
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      "descriptions": [
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          "lang": "en",
          "value": "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_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"
        }
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      "metrics": [
        {
          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable walk runs from `smc_ib_port_event_work`, which is scheduled by RoCE async events an adjacent attacker can generate \u2014 IPv6 Router Advertisements churn the netdev\u0027s addresses into `IB_EVENT_GID_CHANGE`, and a RoCE fabric peer can raise `IB_EVENT_QP_ACCESS_ERR`; the racing link-group add/delete is driven by SMC-R connection setup/teardown from a peer on the same fabric.\nAC:L - The attacker controls both sides of the race \u2014 repeated address/GID churn to re-arm `smcr_port_add()` and rapid SMC-R connection create/teardown to add and free link groups \u2014 and the window spans the entire unlocked list traversal, so the attempt can be repeated indefinitely until it lands.\nPR:N - SMC link groups are created and torn down during the CLC handshake before any application-level authentication, and injecting Router Advertisements or malformed RDMA operations requires no credentials on the target.\nUI:N - Everything is driven by inbound link-layer events and connection churn handled in kernel workqueue context; no local user has to open, mount, or run anything.\nS:U - The corruption is confined to kernel memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unlocked iterator dereferences a `struct smc_link_group` that has already been unlinked and kfree\u0027d, reading `pnet_id`, `type`, `net`, and `lnk[]` out of reallocated slab memory and following freed/reused `list` pointers, which is an attacker-influenceable kernel memory read.\nI:H - Reaching `smc_llc_add_link_local()` on the freed link leads to `smc_llc_enqueue()`, which takes a spinlock in freed memory, performs `list_add_tail()` into the freed `lgr-\u003ellc_event_q` (a write into reclaimed slab), and calls `queue_work()` on a freed `work_struct` \u2014 a use-after-free write usable for control-flow hijack after heap grooming.\nA:H - The bug is a confirmed production kernel oops \u2014 NULL pointer dereference at `smcr_port_add+0xa6` in `smc_ib_port_event_work` \u2014 and any use-after-free on the link-group list reliably panics the machine."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:19:14.490Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d1c6c93c27a4bf48006ab16cd9b38d85559d7645"
        },
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          "url": "https://git.kernel.org/stable/c/06b4934ab2b534bb92935c7601852066ebb9eab8"
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        },
        {
          "url": "https://git.kernel.org/stable/c/f5146e3ef0a9eea405874b36178c19a4863b8989"
        }
      ],
      "title": "net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54318",
    "datePublished": "2025-12-30T12:23:48.134Z",
    "dateReserved": "2025-12-30T12:06:44.531Z",
    "dateUpdated": "2026-08-05T09:19:14.490Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-54318",
      "date": "2026-09-13",
      "epss": "0.00268",
      "percentile": "0.18849"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54318\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:21.090\",\"lastModified\":\"2026-08-04T11:16:40.250\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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_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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nnet/smc: usar smc_lgr_list.lock para proteger la iteraci\u00f3n de smc_lgr_list.list en smcr_port_add\\n\\nMientras se ejecuta smcr_port_add, puede que se a\u00f1adan o eliminen grupos de enlaces (linkgroup) de smc_lgr_list.list al mismo tiempo, lo que puede resultar en un fallo del kernel. Por lo tanto, usar smc_lgr_list.lock para proteger la iteraci\u00f3n de smc_lgr_list.list en smcr_port_add.\\n\\nEl rastreo de llamadas del fallo se muestra a continuaci\u00f3n:\\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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/smc/smc_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1f90a05d9ff907c70456e7c9d7058372679a88c6\",\"lessThan\":\"d1c6c93c27a4bf48006ab16cd9b38d85559d7645\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1f90a05d9ff907c70456e7c9d7058372679a88c6\",\"lessThan\":\"06b4934ab2b534bb92935c7601852066ebb9eab8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1f90a05d9ff907c70456e7c9d7058372679a88c6\",\"lessThan\":\"70c8d17007dc4a07156b7da44509527990e569b3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1f90a05d9ff907c70456e7c9d7058372679a88c6\",\"lessThan\":\"b717463610a27fc0b58484cfead7a623d5913e61\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1f90a05d9ff907c70456e7c9d7058372679a88c6\",\"lessThan\":\"f5146e3ef0a9eea405874b36178c19a4863b8989\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/smc/smc_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.195\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.132\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.54\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.5.4\",\"lessThanOrEqual\":\"6.5.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/06b4934ab2b534bb92935c7601852066ebb9eab8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/70c8d17007dc4a07156b7da44509527990e569b3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b717463610a27fc0b58484cfead7a623d5913e61\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d1c6c93c27a4bf48006ab16cd9b38d85559d7645\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f5146e3ef0a9eea405874b36178c19a4863b8989\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T22:52:07+00:00",
      "cve": "CVE-2023-54318",
      "id": "CVE-2023-54318",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "303",
      "product_status:known_affected": "70",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54318.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:02:36Z",
      "cve": "CVE-2023-54318",
      "id": "CVE-2023-54318",
      "initial_release_date": "2025-12-31T00:25:56Z",
      "product_status:known_affected": "569",
      "product_status:known_not_affected": "248",
      "product_status:recommended": "253",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54318",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54318.json",
      "version": "34"
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.