cve/published/2023/CVE-2023-52481.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: errata: Add Cortex-A520 speculative unprivileged load workaround\n\nImplement the workaround for ARM Cortex-A520 erratum 2966298. On an\naffected Cortex-A520 core, a speculatively executed unprivileged load\nmight leak data from a privileged load via a cache side channel. The\nissue only exists for loads within a translation regime with the same\ntranslation (e.g. same ASID and VMID). Therefore, the issue only affects\nthe return to EL0.\n\nThe workaround is to execute a TLBI before returning to EL0 after all\nloads of privileged data. A non-shareable TLBI to any address is\nsufficient.\n\nThe workaround isn't necessary if page table isolation (KPTI) is\nenabled, but for simplicity it will be. Page table isolation should\nnormally be disabled for Cortex-A520 as it supports the CSV3 feature\nand the E0PD feature (used when KASLR is enabled)."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "Documentation/arch/arm64/silicon-errata.rst",
                  "arch/arm64/Kconfig",
                  "arch/arm64/kernel/cpu_errata.c",
                  "arch/arm64/kernel/entry.S",
                  "arch/arm64/tools/cpucaps"
               ],
               "versions": [
                  {
                     "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                     "lessThan": "6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                     "lessThan": "32b0a4ffcaea44a00a61e40c0d1bcc50362aee25",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                     "lessThan": "471470bc7052d28ce125901877dd10e4c048e513",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "Documentation/arch/arm64/silicon-errata.rst",
                  "arch/arm64/Kconfig",
                  "arch/arm64/kernel/cpu_errata.c",
                  "arch/arm64/kernel/entry.S",
                  "arch/arm64/tools/cpucaps"
               ],
               "versions": [
                  {
                     "version": "6.1.57",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.5.7",
                     "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:*:*:*:*:*:*:*:*",
                           "versionEndExcluding": "6.1.57"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionEndExcluding": "6.5.7"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionEndExcluding": "6.6"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c"
            },
            {
               "url": "https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25"
            },
            {
               "url": "https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513"
            }
         ],
         "title": "arm64: errata: Add Cortex-A520 speculative unprivileged load workaround",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52481",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}