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CVE-2023-53368 (GCVE-0-2023-53368)

Vulnerability from cvelistv5 – Published: 2025-09-17 14:56 – Updated: 2026-05-11 19:43
VLAI
Title
tracing: Fix race issue between cpu buffer write and swap
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix race issue between cpu buffer write and swap Warning happened in rb_end_commit() at code: if (RB_WARN_ON(cpu_buffer, !local_read(&cpu_buffer->committing))) WARNING: CPU: 0 PID: 139 at kernel/trace/ring_buffer.c:3142 rb_commit+0x402/0x4a0 Call Trace: ring_buffer_unlock_commit+0x42/0x250 trace_buffer_unlock_commit_regs+0x3b/0x250 trace_event_buffer_commit+0xe5/0x440 trace_event_buffer_reserve+0x11c/0x150 trace_event_raw_event_sched_switch+0x23c/0x2c0 __traceiter_sched_switch+0x59/0x80 __schedule+0x72b/0x1580 schedule+0x92/0x120 worker_thread+0xa0/0x6f0 It is because the race between writing event into cpu buffer and swapping cpu buffer through file per_cpu/cpu0/snapshot: Write on CPU 0 Swap buffer by per_cpu/cpu0/snapshot on CPU 1 -------- -------- tracing_snapshot_write() [...] ring_buffer_lock_reserve() cpu_buffer = buffer->buffers[cpu]; // 1. Suppose find 'cpu_buffer_a'; [...] rb_reserve_next_event() [...] ring_buffer_swap_cpu() if (local_read(&cpu_buffer_a->committing)) goto out_dec; if (local_read(&cpu_buffer_b->committing)) goto out_dec; buffer_a->buffers[cpu] = cpu_buffer_b; buffer_b->buffers[cpu] = cpu_buffer_a; // 2. cpu_buffer has swapped here. rb_start_commit(cpu_buffer); if (unlikely(READ_ONCE(cpu_buffer->buffer) != buffer)) { // 3. This check passed due to 'cpu_buffer->buffer' [...] // has not changed here. return NULL; } cpu_buffer_b->buffer = buffer_a; cpu_buffer_a->buffer = buffer_b; [...] // 4. Reserve event from 'cpu_buffer_a'. ring_buffer_unlock_commit() [...] cpu_buffer = buffer->buffers[cpu]; // 5. Now find 'cpu_buffer_b' !!! rb_commit(cpu_buffer) rb_end_commit() // 6. WARN for the wrong 'committing' state !!! Based on above analysis, we can easily reproduce by following testcase: ``` bash #!/bin/bash dmesg -n 7 sysctl -w kernel.panic_on_warn=1 TR=/sys/kernel/tracing echo 7 > ${TR}/buffer_size_kb echo "sched:sched_switch" > ${TR}/set_event while [ true ]; do echo 1 > ${TR}/per_cpu/cpu0/snapshot done & while [ true ]; do echo 1 > ${TR}/per_cpu/cpu0/snapshot done & while [ true ]; do echo 1 > ${TR}/per_cpu/cpu0/snapshot done & ``` To fix it, IIUC, we can use smp_call_function_single() to do the swap on the target cpu where the buffer is located, so that above race would be avoided.
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:46 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f1affcaaa861f27752a769f889bf1486ebd301fe , < 90e037cabc2c2dfc39b3dd9c5b22ea91f995539a (git)
Affected: f1affcaaa861f27752a769f889bf1486ebd301fe , < c5d30d6aa83d99fba8dfdd9cf6c4e4e7a63244db (git)
Affected: f1affcaaa861f27752a769f889bf1486ebd301fe , < 6182318ac04648b46db9d441fd7d696337fcdd0b (git)
Affected: f1affcaaa861f27752a769f889bf1486ebd301fe , < 74c85396bd73eca80b96510b4edf93b9a3aff75f (git)
Affected: f1affcaaa861f27752a769f889bf1486ebd301fe , < 89c89da92a60028013f9539be0dcce7e44405a43 (git)
Affected: f1affcaaa861f27752a769f889bf1486ebd301fe , < 37ca1b686078b00cc4ffa008e2190615f7709b5d (git)
Affected: f1affcaaa861f27752a769f889bf1486ebd301fe , < 3163f635b20e9e1fb4659e74f47918c9dddfe64e (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.4.257 , ≤ 5.4.* (semver)
Unaffected: 5.10.195 , ≤ 5.10.* (semver)
Unaffected: 5.15.132 , ≤ 5.15.* (semver)
Unaffected: 6.1.53 , ≤ 6.1.* (semver)
Unaffected: 6.4.16 , ≤ 6.4.* (semver)
Unaffected: 6.5.3 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix race issue between cpu buffer write and swap\n\nWarning happened in rb_end_commit() at code:\n\tif (RB_WARN_ON(cpu_buffer, !local_read(\u0026cpu_buffer-\u003ecommitting)))\n\n  WARNING: CPU: 0 PID: 139 at kernel/trace/ring_buffer.c:3142\n\trb_commit+0x402/0x4a0\n  Call Trace:\n   ring_buffer_unlock_commit+0x42/0x250\n   trace_buffer_unlock_commit_regs+0x3b/0x250\n   trace_event_buffer_commit+0xe5/0x440\n   trace_event_buffer_reserve+0x11c/0x150\n   trace_event_raw_event_sched_switch+0x23c/0x2c0\n   __traceiter_sched_switch+0x59/0x80\n   __schedule+0x72b/0x1580\n   schedule+0x92/0x120\n   worker_thread+0xa0/0x6f0\n\nIt is because the race between writing event into cpu buffer and swapping\ncpu buffer through file per_cpu/cpu0/snapshot:\n\n  Write on CPU 0             Swap buffer by per_cpu/cpu0/snapshot on CPU 1\n  --------                   --------\n                             tracing_snapshot_write()\n                               [...]\n\n  ring_buffer_lock_reserve()\n    cpu_buffer = buffer-\u003ebuffers[cpu]; // 1. Suppose find \u0027cpu_buffer_a\u0027;\n    [...]\n    rb_reserve_next_event()\n      [...]\n\n                               ring_buffer_swap_cpu()\n                                 if (local_read(\u0026cpu_buffer_a-\u003ecommitting))\n                                     goto out_dec;\n                                 if (local_read(\u0026cpu_buffer_b-\u003ecommitting))\n                                     goto out_dec;\n                                 buffer_a-\u003ebuffers[cpu] = cpu_buffer_b;\n                                 buffer_b-\u003ebuffers[cpu] = cpu_buffer_a;\n                                 // 2. cpu_buffer has swapped here.\n\n      rb_start_commit(cpu_buffer);\n      if (unlikely(READ_ONCE(cpu_buffer-\u003ebuffer)\n          != buffer)) { // 3. This check passed due to \u0027cpu_buffer-\u003ebuffer\u0027\n        [...]           //    has not changed here.\n        return NULL;\n      }\n                                 cpu_buffer_b-\u003ebuffer = buffer_a;\n                                 cpu_buffer_a-\u003ebuffer = buffer_b;\n                                 [...]\n\n      // 4. Reserve event from \u0027cpu_buffer_a\u0027.\n\n  ring_buffer_unlock_commit()\n    [...]\n    cpu_buffer = buffer-\u003ebuffers[cpu]; // 5. Now find \u0027cpu_buffer_b\u0027 !!!\n    rb_commit(cpu_buffer)\n      rb_end_commit()  // 6. WARN for the wrong \u0027committing\u0027 state !!!\n\nBased on above analysis, we can easily reproduce by following testcase:\n  ``` bash\n  #!/bin/bash\n\n  dmesg -n 7\n  sysctl -w kernel.panic_on_warn=1\n  TR=/sys/kernel/tracing\n  echo 7 \u003e ${TR}/buffer_size_kb\n  echo \"sched:sched_switch\" \u003e ${TR}/set_event\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  ```\n\nTo fix it, IIUC, we can use smp_call_function_single() to do the swap on\nthe target cpu where the buffer is located, so that above race would be\navoided."
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                    "versionEndExcluding": "6.5.3",
                    "versionStartIncluding": "6.5",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix race issue between cpu buffer write and swap\n\nWarning happened in rb_end_commit() at code:\n\tif (RB_WARN_ON(cpu_buffer, !local_read(\u0026cpu_buffer-\u003ecommitting)))\n\n  WARNING: CPU: 0 PID: 139 at kernel/trace/ring_buffer.c:3142\n\trb_commit+0x402/0x4a0\n  Call Trace:\n   ring_buffer_unlock_commit+0x42/0x250\n   trace_buffer_unlock_commit_regs+0x3b/0x250\n   trace_event_buffer_commit+0xe5/0x440\n   trace_event_buffer_reserve+0x11c/0x150\n   trace_event_raw_event_sched_switch+0x23c/0x2c0\n   __traceiter_sched_switch+0x59/0x80\n   __schedule+0x72b/0x1580\n   schedule+0x92/0x120\n   worker_thread+0xa0/0x6f0\n\nIt is because the race between writing event into cpu buffer and swapping\ncpu buffer through file per_cpu/cpu0/snapshot:\n\n  Write on CPU 0             Swap buffer by per_cpu/cpu0/snapshot on CPU 1\n  --------                   --------\n                             tracing_snapshot_write()\n                               [...]\n\n  ring_buffer_lock_reserve()\n    cpu_buffer = buffer-\u003ebuffers[cpu]; // 1. Suppose find \u0027cpu_buffer_a\u0027;\n    [...]\n    rb_reserve_next_event()\n      [...]\n\n                               ring_buffer_swap_cpu()\n                                 if (local_read(\u0026cpu_buffer_a-\u003ecommitting))\n                                     goto out_dec;\n                                 if (local_read(\u0026cpu_buffer_b-\u003ecommitting))\n                                     goto out_dec;\n                                 buffer_a-\u003ebuffers[cpu] = cpu_buffer_b;\n                                 buffer_b-\u003ebuffers[cpu] = cpu_buffer_a;\n                                 // 2. cpu_buffer has swapped here.\n\n      rb_start_commit(cpu_buffer);\n      if (unlikely(READ_ONCE(cpu_buffer-\u003ebuffer)\n          != buffer)) { // 3. This check passed due to \u0027cpu_buffer-\u003ebuffer\u0027\n        [...]           //    has not changed here.\n        return NULL;\n      }\n                                 cpu_buffer_b-\u003ebuffer = buffer_a;\n                                 cpu_buffer_a-\u003ebuffer = buffer_b;\n                                 [...]\n\n      // 4. Reserve event from \u0027cpu_buffer_a\u0027.\n\n  ring_buffer_unlock_commit()\n    [...]\n    cpu_buffer = buffer-\u003ebuffers[cpu]; // 5. Now find \u0027cpu_buffer_b\u0027 !!!\n    rb_commit(cpu_buffer)\n      rb_end_commit()  // 6. WARN for the wrong \u0027committing\u0027 state !!!\n\nBased on above analysis, we can easily reproduce by following testcase:\n  ``` bash\n  #!/bin/bash\n\n  dmesg -n 7\n  sysctl -w kernel.panic_on_warn=1\n  TR=/sys/kernel/tracing\n  echo 7 \u003e ${TR}/buffer_size_kb\n  echo \"sched:sched_switch\" \u003e ${TR}/set_event\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  ```\n\nTo fix it, IIUC, we can use smp_call_function_single() to do the swap on\nthe target cpu where the buffer is located, so that above race would be\navoided."
          }
        ],
        "id": "CVE-2023-53368",
        "lastModified": "2026-06-17T06:45:07.260",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 4.7,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.0,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 4.7,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.0,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
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                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T18:46:08.777326Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-09-17T15:15:41.220",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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            "url": "https://git.kernel.org/stable/c/3163f635b20e9e1fb4659e74f47918c9dddfe64e"
          },
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/37ca1b686078b00cc4ffa008e2190615f7709b5d"
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          },
          {
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/74c85396bd73eca80b96510b4edf93b9a3aff75f"
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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            "url": "https://git.kernel.org/stable/c/89c89da92a60028013f9539be0dcce7e44405a43"
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/90e037cabc2c2dfc39b3dd9c5b22ea91f995539a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c5d30d6aa83d99fba8dfdd9cf6c4e4e7a63244db"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-362"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-362"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T22:19:36+00:00",
      "cve": "CVE-2023-53368",
      "id": "CVE-2023-53368",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tracing: Fix race issue between cpu buffer write and swap",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53368.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T13:59:22Z",
      "cve": "CVE-2023-53368",
      "id": "CVE-2023-53368",
      "initial_release_date": "2025-09-18T23:38:38Z",
      "product_status:known_affected": "534",
      "product_status:known_not_affected": "15",
      "product_status:recommended": "539",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53368",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53368.json",
      "version": "56"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "HIGH",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 4.7,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2023-53368",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-01-14T18:46:08.777326Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-362",
                    "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-01-14T18:46:04.570Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "kernel/trace/trace.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "90e037cabc2c2dfc39b3dd9c5b22ea91f995539a",
                  "status": "affected",
                  "version": "f1affcaaa861f27752a769f889bf1486ebd301fe",
                  "versionType": "git"
                },
                {
                  "lessThan": "c5d30d6aa83d99fba8dfdd9cf6c4e4e7a63244db",
                  "status": "affected",
                  "version": "f1affcaaa861f27752a769f889bf1486ebd301fe",
                  "versionType": "git"
                },
                {
                  "lessThan": "6182318ac04648b46db9d441fd7d696337fcdd0b",
                  "status": "affected",
                  "version": "f1affcaaa861f27752a769f889bf1486ebd301fe",
                  "versionType": "git"
                },
                {
                  "lessThan": "74c85396bd73eca80b96510b4edf93b9a3aff75f",
                  "status": "affected",
                  "version": "f1affcaaa861f27752a769f889bf1486ebd301fe",
                  "versionType": "git"
                },
                {
                  "lessThan": "89c89da92a60028013f9539be0dcce7e44405a43",
                  "status": "affected",
                  "version": "f1affcaaa861f27752a769f889bf1486ebd301fe",
                  "versionType": "git"
                },
                {
                  "lessThan": "37ca1b686078b00cc4ffa008e2190615f7709b5d",
                  "status": "affected",
                  "version": "f1affcaaa861f27752a769f889bf1486ebd301fe",
                  "versionType": "git"
                },
                {
                  "lessThan": "3163f635b20e9e1fb4659e74f47918c9dddfe64e",
                  "status": "affected",
                  "version": "f1affcaaa861f27752a769f889bf1486ebd301fe",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "kernel/trace/trace.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.10"
                },
                {
                  "lessThan": "3.10",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.257",
                  "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": "6.1.53",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.4.*",
                  "status": "unaffected",
                  "version": "6.4.16",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.5.*",
                  "status": "unaffected",
                  "version": "6.5.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.6",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.257",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.195",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.132",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.53",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.4.16",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.5.3",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix race issue between cpu buffer write and swap\n\nWarning happened in rb_end_commit() at code:\n\tif (RB_WARN_ON(cpu_buffer, !local_read(\u0026cpu_buffer-\u003ecommitting)))\n\n  WARNING: CPU: 0 PID: 139 at kernel/trace/ring_buffer.c:3142\n\trb_commit+0x402/0x4a0\n  Call Trace:\n   ring_buffer_unlock_commit+0x42/0x250\n   trace_buffer_unlock_commit_regs+0x3b/0x250\n   trace_event_buffer_commit+0xe5/0x440\n   trace_event_buffer_reserve+0x11c/0x150\n   trace_event_raw_event_sched_switch+0x23c/0x2c0\n   __traceiter_sched_switch+0x59/0x80\n   __schedule+0x72b/0x1580\n   schedule+0x92/0x120\n   worker_thread+0xa0/0x6f0\n\nIt is because the race between writing event into cpu buffer and swapping\ncpu buffer through file per_cpu/cpu0/snapshot:\n\n  Write on CPU 0             Swap buffer by per_cpu/cpu0/snapshot on CPU 1\n  --------                   --------\n                             tracing_snapshot_write()\n                               [...]\n\n  ring_buffer_lock_reserve()\n    cpu_buffer = buffer-\u003ebuffers[cpu]; // 1. Suppose find \u0027cpu_buffer_a\u0027;\n    [...]\n    rb_reserve_next_event()\n      [...]\n\n                               ring_buffer_swap_cpu()\n                                 if (local_read(\u0026cpu_buffer_a-\u003ecommitting))\n                                     goto out_dec;\n                                 if (local_read(\u0026cpu_buffer_b-\u003ecommitting))\n                                     goto out_dec;\n                                 buffer_a-\u003ebuffers[cpu] = cpu_buffer_b;\n                                 buffer_b-\u003ebuffers[cpu] = cpu_buffer_a;\n                                 // 2. cpu_buffer has swapped here.\n\n      rb_start_commit(cpu_buffer);\n      if (unlikely(READ_ONCE(cpu_buffer-\u003ebuffer)\n          != buffer)) { // 3. This check passed due to \u0027cpu_buffer-\u003ebuffer\u0027\n        [...]           //    has not changed here.\n        return NULL;\n      }\n                                 cpu_buffer_b-\u003ebuffer = buffer_a;\n                                 cpu_buffer_a-\u003ebuffer = buffer_b;\n                                 [...]\n\n      // 4. Reserve event from \u0027cpu_buffer_a\u0027.\n\n  ring_buffer_unlock_commit()\n    [...]\n    cpu_buffer = buffer-\u003ebuffers[cpu]; // 5. Now find \u0027cpu_buffer_b\u0027 !!!\n    rb_commit(cpu_buffer)\n      rb_end_commit()  // 6. WARN for the wrong \u0027committing\u0027 state !!!\n\nBased on above analysis, we can easily reproduce by following testcase:\n  ``` bash\n  #!/bin/bash\n\n  dmesg -n 7\n  sysctl -w kernel.panic_on_warn=1\n  TR=/sys/kernel/tracing\n  echo 7 \u003e ${TR}/buffer_size_kb\n  echo \"sched:sched_switch\" \u003e ${TR}/set_event\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  while [ true ]; do\n          echo 1 \u003e ${TR}/per_cpu/cpu0/snapshot\n  done \u0026\n  ```\n\nTo fix it, IIUC, we can use smp_call_function_single() to do the swap on\nthe target cpu where the buffer is located, so that above race would be\navoided."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:43:35.800Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/90e037cabc2c2dfc39b3dd9c5b22ea91f995539a"
            },
            {
              "url": "https://git.kernel.org/stable/c/c5d30d6aa83d99fba8dfdd9cf6c4e4e7a63244db"
            },
            {
              "url": "https://git.kernel.org/stable/c/6182318ac04648b46db9d441fd7d696337fcdd0b"
            },
            {
              "url": "https://git.kernel.org/stable/c/74c85396bd73eca80b96510b4edf93b9a3aff75f"
            },
            {
              "url": "https://git.kernel.org/stable/c/89c89da92a60028013f9539be0dcce7e44405a43"
            },
            {
              "url": "https://git.kernel.org/stable/c/37ca1b686078b00cc4ffa008e2190615f7709b5d"
            },
            {
              "url": "https://git.kernel.org/stable/c/3163f635b20e9e1fb4659e74f47918c9dddfe64e"
            }
          ],
          "title": "tracing: Fix race issue between cpu buffer write and swap",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-53368",
        "datePublished": "2025-09-17T14:56:56.752Z",
        "dateReserved": "2025-09-17T14:54:09.734Z",
        "dateUpdated": "2026-05-11T19:43:35.800Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


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.