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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"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "d1c6c93c27a4bf48006ab16cd9b38d85559d7645",
              "status": "affected",
              "version": "1f90a05d9ff907c70456e7c9d7058372679a88c6",
              "versionType": "git"
            },
            {
              "lessThan": "06b4934ab2b534bb92935c7601852066ebb9eab8",
              "status": "affected",
              "version": "1f90a05d9ff907c70456e7c9d7058372679a88c6",
              "versionType": "git"
            },
            {
              "lessThan": "70c8d17007dc4a07156b7da44509527990e569b3",
              "status": "affected",
              "version": "1f90a05d9ff907c70456e7c9d7058372679a88c6",
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          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.54",
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            {
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              "status": "unaffected",
              "version": "6.5.4",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.195",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
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                  "versionEndExcluding": "5.15.132",
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                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.1.54",
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                  "vulnerable": true
                },
                {
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              "negate": false,
              "operator": "OR"
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      "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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "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"
        },
        {
          "url": "https://git.kernel.org/stable/c/70c8d17007dc4a07156b7da44509527990e569b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/b717463610a27fc0b58484cfead7a623d5913e61"
        },
        {
          "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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  "cveMetadata": {
    "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": "2026-09-19",
      "epss": "0.00268",
      "percentile": "0.1917"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/smc/smc_core.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "06b4934ab2b534bb92935c7601852066ebb9eab8",
                    "status": "affected",
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                    "versionType": "git"
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                  {
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                    "status": "affected",
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                    "versionType": "git"
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                  {
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                    "status": "affected",
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                    "versionType": "git"
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                    "versionType": "git"
                  }
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              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/smc/smc_core.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.8"
                  },
                  {
                    "lessThan": "5.8",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.195",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.132",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.54",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.5.*",
                    "status": "unaffected",
                    "version": "6.5.4",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.6",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "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"
          }
        ],
        "id": "CVE-2023-54318",
        "lastModified": "2026-08-04T11:16:40.250",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2025-12-30T13:16:21.090",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "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"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "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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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.


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.