{"id":"CVE-2026-53282","state":"PUBLISHED","title":"x86/kexec: Push kjump return address even for non-kjump kexec","description":"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.","publishedAt":"2026-06-26T19:40:43.754Z","updatedAt":"2026-06-26T19:40:43.754Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e","status":"affected","lessThan":"b0bd7a850e1f082560959707dbf57b0402071646","versionType":"git"},{"version":"2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e","status":"affected","lessThan":"7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c","versionType":"git"},{"version":"2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e","status":"affected","lessThan":"786a45757dcdf8f2beb9d4a6db605db16c18b2b4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/relocate_kernel_64.S"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/relocate_kernel_64.S"]}],"references":["https://git.kernel.org/stable/c/b0bd7a850e1f082560959707dbf57b0402071646","https://git.kernel.org/stable/c/7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c","https://git.kernel.org/stable/c/786a45757dcdf8f2beb9d4a6db605db16c18b2b4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53282.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53282","state":"PUBLISHED","datePublished":"2026-06-26T19:40:43.754Z","dateUpdated":"2026-06-26T19:40:43.754Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.396Z"},"containers":{"cna":{"title":"x86/kexec: Push kjump return address even for non-kjump kexec","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e","status":"affected","lessThan":"b0bd7a850e1f082560959707dbf57b0402071646","versionType":"git"},{"version":"2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e","status":"affected","lessThan":"7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c","versionType":"git"},{"version":"2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e","status":"affected","lessThan":"786a45757dcdf8f2beb9d4a6db605db16c18b2b4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/relocate_kernel_64.S"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/relocate_kernel_64.S"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-26T19:40:43.754Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}