{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/fpu: Keep xfd_state in sync with MSR_IA32_XFD\n\nCommit 672365477ae8 (\"x86/fpu: Update XFD state where required\") and\ncommit 8bf26758ca96 (\"x86/fpu: Add XFD state to fpstate\") introduced a\nper CPU variable xfd_state to keep the MSR_IA32_XFD value cached, in\norder to avoid unnecessary writes to the MSR.\n\nOn CPU hotplug MSR_IA32_XFD is reset to the init_fpstate.xfd, which\nwipes out any stale state. But the per CPU cached xfd value is not\nreset, which brings them out of sync.\n\nAs a consequence a subsequent xfd_update_state() might fail to update\nthe MSR which in turn can result in XRSTOR raising a #NM in kernel\nspace, which crashes the kernel.\n\nTo fix this, introduce xfd_set_state() to write xfd_state together\nwith MSR_IA32_XFD, and use it in all places that set MSR_IA32_XFD."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "arch/x86/kernel/fpu/xstate.c",
                  "arch/x86/kernel/fpu/xstate.h"
               ],
               "versions": [
                  {
                     "version": "672365477ae8",
                     "lessThan": "21c7c00dae55",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "672365477ae8",
                     "lessThan": "1acbca933313",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "672365477ae8",
                     "lessThan": "92b0f04e9376",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "672365477ae8",
                     "lessThan": "b61e3b7055ac",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "672365477ae8",
                     "lessThan": "10e4b5166df9",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "arch/x86/kernel/fpu/xstate.c",
                  "arch/x86/kernel/fpu/xstate.h"
               ],
               "versions": [
                  {
                     "version": "5.16",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.16",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.84",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.24",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.12",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8.3",
                     "lessThanOrEqual": "6.8.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41d"
            },
            {
               "url": "https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cd"
            },
            {
               "url": "https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8"
            },
            {
               "url": "https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624"
            },
            {
               "url": "https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422"
            }
         ],
         "title": "x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-35801",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}