CVE-2026-53282 (GCVE-0-2026-53282)
Vulnerability from cvelistv5
Published
2026-06-26 19:40
Modified
2026-06-26 19:40
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Push kjump return address even for non-kjump kexec The version of purgatory code shipped by kexec-tools attempts to look above the top of its stack to find a return address for a kjump, even in a non-kjump kexec. After the commit in Fixes: the word above the stack might not be there, leading to a fault (which is at least now caught by my exception-handling code in kexec). That commit fixed things for the actual kjump path, but no longer "gratuitously" pushes the unused return address to the stack in the non-kjump path. Put that *back* in the non-kjump path, to prevent purgatory from crashing when trying to access it.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e
Version: 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e
Version: 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/relocate_kernel_64.S"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b0bd7a850e1f082560959707dbf57b0402071646",
              "status": "affected",
              "version": "2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e",
              "versionType": "git"
            },
            {
              "lessThan": "7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c",
              "status": "affected",
              "version": "2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e",
              "versionType": "git"
            },
            {
              "lessThan": "786a45757dcdf8f2beb9d4a6db605db16c18b2b4",
              "status": "affected",
              "version": "2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/relocate_kernel_64.S"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kexec: Push kjump return address even for non-kjump kexec\n\nThe version of purgatory code shipped by kexec-tools attempts to look above\nthe top of its stack to find a return address for a kjump, even in a non-kjump\nkexec.\n\nAfter the commit in Fixes: the word above the stack might not be there,\nleading to a fault (which is at least now caught by my exception-handling code\nin kexec).\n\nThat commit fixed things for the actual kjump path, but no longer\n\"gratuitously\" pushes the unused return address to the stack in the non-kjump\npath. Put that *back* in the non-kjump path, to prevent purgatory from\ncrashing when trying to access it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-26T19:40:43.754Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b0bd7a850e1f082560959707dbf57b0402071646"
        },
        {
          "url": "https://git.kernel.org/stable/c/7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/786a45757dcdf8f2beb9d4a6db605db16c18b2b4"
        }
      ],
      "title": "x86/kexec: Push kjump return address even for non-kjump kexec",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53282",
    "datePublished": "2026-06-26T19:40:43.754Z",
    "dateReserved": "2026-06-09T07:44:35.396Z",
    "dateUpdated": "2026-06-26T19:40:43.754Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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