CVE-2023-53169 (GCVE-0-2023-53169)
Vulnerability from cvelistv5
Published
2025-09-15 14:04
Modified
2025-09-15 14:04
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/resctrl: Clear staged_config[] before and after it is used As a temporary storage, staged_config[] in rdt_domain should be cleared before and after it is used. The stale value in staged_config[] could cause an MSR access error. Here is a reproducer on a system with 16 usable CLOSIDs for a 15-way L3 Cache (MBA should be disabled if the number of CLOSIDs for MB is less than 16.) : mount -t resctrl resctrl -o cdp /sys/fs/resctrl mkdir /sys/fs/resctrl/p{1..7} umount /sys/fs/resctrl/ mount -t resctrl resctrl /sys/fs/resctrl mkdir /sys/fs/resctrl/p{1..8} An error occurs when creating resource group named p8: unchecked MSR access error: WRMSR to 0xca0 (tried to write 0x00000000000007ff) at rIP: 0xffffffff82249142 (cat_wrmsr+0x32/0x60) Call Trace: <IRQ> __flush_smp_call_function_queue+0x11d/0x170 __sysvec_call_function+0x24/0xd0 sysvec_call_function+0x89/0xc0 </IRQ> <TASK> asm_sysvec_call_function+0x16/0x20 When creating a new resource control group, hardware will be configured by the following process: rdtgroup_mkdir() rdtgroup_mkdir_ctrl_mon() rdtgroup_init_alloc() resctrl_arch_update_domains() resctrl_arch_update_domains() iterates and updates all resctrl_conf_type whose have_new_ctrl is true. Since staged_config[] holds the same values as when CDP was enabled, it will continue to update the CDP_CODE and CDP_DATA configurations. When group p8 is created, get_config_index() called in resctrl_arch_update_domains() will return 16 and 17 as the CLOSIDs for CDP_CODE and CDP_DATA, which will be translated to an invalid register - 0xca0 in this scenario. Fix it by clearing staged_config[] before and after it is used. [reinette: re-order commit tags]
References
Impacted products
Vendor Product Version
Linux Linux Version: 75408e43509ed6207870c0e7e28656acbbc1f7fd
Version: 75408e43509ed6207870c0e7e28656acbbc1f7fd
Version: 75408e43509ed6207870c0e7e28656acbbc1f7fd
Version: 75408e43509ed6207870c0e7e28656acbbc1f7fd
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/cpu/resctrl/ctrlmondata.c",
            "arch/x86/kernel/cpu/resctrl/internal.h",
            "arch/x86/kernel/cpu/resctrl/rdtgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/cpu/resctrl/ctrlmondata.c",
            "arch/x86/kernel/cpu/resctrl/internal.h",
            "arch/x86/kernel/cpu/resctrl/rdtgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.15"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.104",
              "versionType": "semver"
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              "version": "6.1.21",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.2.8",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "versionEndExcluding": "5.15.104",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
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                  "versionEndExcluding": "6.1.21",
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                  "versionEndExcluding": "6.3",
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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\nx86/resctrl: Clear staged_config[] before and after it is used\n\nAs a temporary storage, staged_config[] in rdt_domain should be cleared\nbefore and after it is used. The stale value in staged_config[] could\ncause an MSR access error.\n\nHere is a reproducer on a system with 16 usable CLOSIDs for a 15-way L3\nCache (MBA should be disabled if the number of CLOSIDs for MB is less than\n16.) :\n\tmount -t resctrl resctrl -o cdp /sys/fs/resctrl\n\tmkdir /sys/fs/resctrl/p{1..7}\n\tumount /sys/fs/resctrl/\n\tmount -t resctrl resctrl /sys/fs/resctrl\n\tmkdir /sys/fs/resctrl/p{1..8}\n\nAn error occurs when creating resource group named p8:\n    unchecked MSR access error: WRMSR to 0xca0 (tried to write 0x00000000000007ff) at rIP: 0xffffffff82249142 (cat_wrmsr+0x32/0x60)\n    Call Trace:\n     \u003cIRQ\u003e\n     __flush_smp_call_function_queue+0x11d/0x170\n     __sysvec_call_function+0x24/0xd0\n     sysvec_call_function+0x89/0xc0\n     \u003c/IRQ\u003e\n     \u003cTASK\u003e\n     asm_sysvec_call_function+0x16/0x20\n\nWhen creating a new resource control group, hardware will be configured\nby the following process:\n    rdtgroup_mkdir()\n      rdtgroup_mkdir_ctrl_mon()\n        rdtgroup_init_alloc()\n          resctrl_arch_update_domains()\n\nresctrl_arch_update_domains() iterates and updates all resctrl_conf_type\nwhose have_new_ctrl is true. Since staged_config[] holds the same values as\nwhen CDP was enabled, it will continue to update the CDP_CODE and CDP_DATA\nconfigurations. When group p8 is created, get_config_index() called in\nresctrl_arch_update_domains() will return 16 and 17 as the CLOSIDs for\nCDP_CODE and CDP_DATA, which will be translated to an invalid register -\n0xca0 in this scenario.\n\nFix it by clearing staged_config[] before and after it is used.\n\n[reinette: re-order commit tags]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:04:02.395Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/86db319d25db70cf4af4557e05f6fa6f39c70003"
        },
        {
          "url": "https://git.kernel.org/stable/c/3fc5941ecc31a495b6b84b465f36155009db99b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/8ecc60ef9318f0d533b866fa421858cc185bccfc"
        },
        {
          "url": "https://git.kernel.org/stable/c/0424a7dfe9129b93f29b277511a60e87f052ac6b"
        }
      ],
      "title": "x86/resctrl: Clear staged_config[] before and after it is used",
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        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53169",
    "datePublished": "2025-09-15T14:04:02.395Z",
    "dateReserved": "2025-09-15T13:59:19.063Z",
    "dateUpdated": "2025-09-15T14:04:02.395Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53169\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T14:15:38.693\",\"lastModified\":\"2025-09-15T15:22:27.090\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nx86/resctrl: Clear staged_config[] before and after it is used\\n\\nAs a temporary storage, staged_config[] in rdt_domain should be cleared\\nbefore and after it is used. The stale value in staged_config[] could\\ncause an MSR access error.\\n\\nHere is a reproducer on a system with 16 usable CLOSIDs for a 15-way L3\\nCache (MBA should be disabled if the number of CLOSIDs for MB is less than\\n16.) :\\n\\tmount -t resctrl resctrl -o cdp /sys/fs/resctrl\\n\\tmkdir /sys/fs/resctrl/p{1..7}\\n\\tumount /sys/fs/resctrl/\\n\\tmount -t resctrl resctrl /sys/fs/resctrl\\n\\tmkdir /sys/fs/resctrl/p{1..8}\\n\\nAn error occurs when creating resource group named p8:\\n    unchecked MSR access error: WRMSR to 0xca0 (tried to write 0x00000000000007ff) at rIP: 0xffffffff82249142 (cat_wrmsr+0x32/0x60)\\n    Call Trace:\\n     \u003cIRQ\u003e\\n     __flush_smp_call_function_queue+0x11d/0x170\\n     __sysvec_call_function+0x24/0xd0\\n     sysvec_call_function+0x89/0xc0\\n     \u003c/IRQ\u003e\\n     \u003cTASK\u003e\\n     asm_sysvec_call_function+0x16/0x20\\n\\nWhen creating a new resource control group, hardware will be configured\\nby the following process:\\n    rdtgroup_mkdir()\\n      rdtgroup_mkdir_ctrl_mon()\\n        rdtgroup_init_alloc()\\n          resctrl_arch_update_domains()\\n\\nresctrl_arch_update_domains() iterates and updates all resctrl_conf_type\\nwhose have_new_ctrl is true. Since staged_config[] holds the same values as\\nwhen CDP was enabled, it will continue to update the CDP_CODE and CDP_DATA\\nconfigurations. When group p8 is created, get_config_index() called in\\nresctrl_arch_update_domains() will return 16 and 17 as the CLOSIDs for\\nCDP_CODE and CDP_DATA, which will be translated to an invalid register -\\n0xca0 in this scenario.\\n\\nFix it by clearing staged_config[] before and after it is used.\\n\\n[reinette: re-order commit tags]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0424a7dfe9129b93f29b277511a60e87f052ac6b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3fc5941ecc31a495b6b84b465f36155009db99b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/86db319d25db70cf4af4557e05f6fa6f39c70003\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8ecc60ef9318f0d533b866fa421858cc185bccfc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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