perf/x86/intel/lbr: Fix unchecked MSR access error on HSW

{
  "id": "016f85e90a7a54bc7481fe426da4b4852325acb2fde3fa590bb9fbf50a1fe9a1",
  "url": "https://osv.dev/vulnerability/CVE-2022-49565",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "perf/x86/intel/lbr: Fix unchecked MSR access error on HSW",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/lbr: Fix unchecked MSR access error on HSW The fuzzer triggers the below trace. [ 7763.384369] unchecked MSR access error: WRMSR to 0x689 (tried to write 0x1fffffff8101349e) at rIP: 0xffffffff810704a4 (native_write_msr+0x4/0x20) [ 7763.397420] Call Trace: [ 7763.399881] [ 7763.401994] intel_pmu_lbr_restore+0x9a/0x1f0 [ 7763.406363] intel_pmu_lbr_sched_task+0x91/0x1c0 [ 7763.410992] __perf_event_task_sched_in+0x1cd/0x240 On a machine with the LBR format LBR_FORMAT_EIP_FLAGS2, when the TSX is disabled, a TSX quirk is required to access LBR from registers. The lbr_from_signext_quirk_needed() is introduced to determine whether the TSX quirk should be applied. However, the lbr_from_signext_quirk_needed() is invoked before the intel_pmu_lbr_init(), which parses the LBR format information. Without the correct LBR format information, the TSX quirk never be applied. Move the lbr_from_signext_quirk_needed() into the intel_pmu_lbr_init(). Checking x86_pmu.lbr_has_tsx in the lbr_from_signext_quirk_needed() is not required anymore. Both LBR_FORMAT_EIP_FLAGS2 and LBR_FORMAT_INFO have LBR_TSX flag, but only the LBR_FORMAT_EIP_FLAGS2 requirs the quirk. Update the comments accordingly.",
    "evidence": "osv:CVE-2022-49565",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.18.15",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49565",
      "aliases": [
        "CVE-2022-49565"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "1ac7fd8159a842b3aa51f0b46a351fa3eeb8fbf3"
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                {
                  "fixed": "625bcd0685a1612225df83468c83412fc0edb3d7"
                },
                {
                  "fixed": "b0380e13502adf7dd8be4c47d622c3522aae6c63"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49565.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.17.0"
                },
                {
                  "fixed": "5.18.15"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49565.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.287759760Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/625bcd0685a1612225df83468c83412fc0edb3d7",
        "https://git.kernel.org/stable/c/b0380e13502adf7dd8be4c47d622c3522aae6c63",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49565.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49565",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49565.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49565",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 503143,
  "published_at": "2025-02-26T02:23:11.213+00:00"
}