{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix a kernel verifier crash in stacksafe()\n\nDaniel Hodges reported a kernel verifier crash when playing with sched-ext.\nFurther investigation shows that the crash is due to invalid memory access\nin stacksafe(). More specifically, it is the following code:\n\n    if (exact != NOT_EXACT &&\n        old->stack[spi].slot_type[i % BPF_REG_SIZE] !=\n        cur->stack[spi].slot_type[i % BPF_REG_SIZE])\n            return false;\n\nThe 'i' iterates old->allocated_stack.\nIf cur->allocated_stack < old->allocated_stack the out-of-bound\naccess will happen.\n\nTo fix the issue add 'i >= cur->allocated_stack' check such that if\nthe condition is true, stacksafe() should fail. Otherwise,\ncur->stack[spi].slot_type[i % BPF_REG_SIZE] memory access is legal."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "kernel/bpf/verifier.c"
               ],
               "versions": [
                  {
                     "version": "ab470fefce28",
                     "lessThan": "7cad3174cc79",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2793a8b015f7",
                     "lessThan": "6e3987ac310c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2793a8b015f7",
                     "lessThan": "bed2eb964c70",
                     "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/bpf/verifier.c"
               ],
               "versions": [
                  {
                     "version": "6.7",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "6.7",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.48",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10.7",
                     "lessThanOrEqual": "6.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.11",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/7cad3174cc79519bf5f6c4441780264416822c08"
            },
            {
               "url": "https://git.kernel.org/stable/c/6e3987ac310c74bb4dd6a2fa8e46702fe505fb2b"
            },
            {
               "url": "https://git.kernel.org/stable/c/bed2eb964c70b780fb55925892a74f26cb590b25"
            }
         ],
         "title": "bpf: Fix a kernel verifier crash in stacksafe()",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-45020",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}