{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53368", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:54:09.734Z", "datePublished": "2025-09-17T14:56:56.752Z", "dateUpdated": "2026-05-11T19:43:35.800Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:43:35.800Z" }, "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(&cpu_buffer->committing)))\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->buffers[cpu]; // 1. Suppose find 'cpu_buffer_a';\n [...]\n rb_reserve_next_event()\n [...]\n\n ring_buffer_swap_cpu()\n if (local_read(&cpu_buffer_a->committing))\n goto out_dec;\n if (local_read(&cpu_buffer_b->committing))\n goto out_dec;\n buffer_a->buffers[cpu] = cpu_buffer_b;\n buffer_b->buffers[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->buffer)\n != buffer)) { // 3. This check passed due to 'cpu_buffer->buffer'\n [...] // has not changed here.\n return NULL;\n }\n cpu_buffer_b->buffer = buffer_a;\n cpu_buffer_a->buffer = buffer_b;\n [...]\n\n // 4. Reserve event from 'cpu_buffer_a'.\n\n ring_buffer_unlock_commit()\n [...]\n cpu_buffer = buffer->buffers[cpu]; // 5. Now find 'cpu_buffer_b' !!!\n rb_commit(cpu_buffer)\n rb_end_commit() // 6. WARN for the wrong 'committing' 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 > ${TR}/buffer_size_kb\n echo \"sched:sched_switch\" > ${TR}/set_event\n while [ true ]; do\n echo 1 > ${TR}/per_cpu/cpu0/snapshot\n done &\n while [ true ]; do\n echo 1 > ${TR}/per_cpu/cpu0/snapshot\n done &\n while [ true ]; do\n echo 1 > ${TR}/per_cpu/cpu0/snapshot\n done &\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." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace.c" ], "versions": [ { "version": "f1affcaaa861f27752a769f889bf1486ebd301fe", "lessThan": "90e037cabc2c2dfc39b3dd9c5b22ea91f995539a", "status": "affected", "versionType": "git" }, { "version": "f1affcaaa861f27752a769f889bf1486ebd301fe", "lessThan": "c5d30d6aa83d99fba8dfdd9cf6c4e4e7a63244db", "status": "affected", "versionType": "git" }, { "version": "f1affcaaa861f27752a769f889bf1486ebd301fe", "lessThan": "6182318ac04648b46db9d441fd7d696337fcdd0b", "status": "affected", "versionType": "git" }, { "version": "f1affcaaa861f27752a769f889bf1486ebd301fe", "lessThan": "74c85396bd73eca80b96510b4edf93b9a3aff75f", "status": "affected", "versionType": "git" }, { "version": "f1affcaaa861f27752a769f889bf1486ebd301fe", "lessThan": "89c89da92a60028013f9539be0dcce7e44405a43", "status": "affected", "versionType": "git" }, { "version": "f1affcaaa861f27752a769f889bf1486ebd301fe", "lessThan": "37ca1b686078b00cc4ffa008e2190615f7709b5d", "status": "affected", "versionType": "git" }, { "version": "f1affcaaa861f27752a769f889bf1486ebd301fe", "lessThan": "3163f635b20e9e1fb4659e74f47918c9dddfe64e", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace.c" ], "versions": [ { "version": "3.10", "status": "affected" }, { "version": "0", "lessThan": "3.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.257", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.195", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.132", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.53", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.16", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5.3", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6", "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": "3.10", "versionEndExcluding": "5.4.257" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "5.10.195" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "5.15.132" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.1.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.4.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.5.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.6" } ] } ] } ], "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" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53368", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:46:08.777326Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:53:02.706Z" } } ] } }