{"api_version":"1","generated_at":"2026-09-12T03:12:55+00:00","cve":"CVE-2026-89765","urls":{"html":"https://cve.report/CVE-2026-89765","api":"https://cve.report/api/cve/CVE-2026-89765.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89765","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89765"},"summary":{"title":"timers/itimer: Zero-init old itimerval before copy to userspace","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntimers/itimer: Zero-init old itimerval before copy to userspace\n\nOn native sparc64, struct __kernel_old_timeval contains a four-byte hole\nafter tv_usec because tv_sec is 64-bit while __kernel_suseconds_t is 32-bit.\nput_itimerval() fills only the named fields in a stack-allocated\n__kernel_old_itimerval and copies the entire object to userspace, so\ngetitimer() can expose the two padding holes.\n\nZero-initialize the aggregate before assigning the fields so implicit\npadding is deterministic before it crosses the user/kernel boundary.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:20:07","updated_at":"2026-09-11 20:20:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e","name":"https://git.kernel.org/stable/c/2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/00ef529a5402f41eb1d227916437e237450719f9","name":"https://git.kernel.org/stable/c/00ef529a5402f41eb1d227916437e237450719f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8","name":"https://git.kernel.org/stable/c/18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4","name":"https://git.kernel.org/stable/c/4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89765","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89765","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 00ef529a5402f41eb1d227916437e237450719f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.109 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.50 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.2.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/time/itimer.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"00ef529a5402f41eb1d227916437e237450719f9","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6.12.109","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.18.50","status":"affected","version":"0","versionType":"semver"},{"lessThan":"7.2.4","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/time/itimer.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntimers/itimer: Zero-init old itimerval before copy to userspace\n\nOn native sparc64, struct __kernel_old_timeval contains a four-byte hole\nafter tv_usec because tv_sec is 64-bit while __kernel_suseconds_t is 32-bit.\nput_itimerval() fills only the named fields in a stack-allocated\n__kernel_old_itimerval and copies the entire object to userspace, so\ngetitimer() can expose the two padding holes.\n\nZero-initialize the aggregate before assigning the fields so implicit\npadding is deterministic before it crosses the user/kernel boundary."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:47:05.851Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4"},{"url":"https://git.kernel.org/stable/c/2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e"},{"url":"https://git.kernel.org/stable/c/00ef529a5402f41eb1d227916437e237450719f9"},{"url":"https://git.kernel.org/stable/c/18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8"}],"title":"timers/itimer: Zero-init old itimerval before copy to userspace","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89765","datePublished":"2026-09-11T19:47:05.851Z","dateReserved":"2026-09-11T19:38:34.764Z","dateUpdated":"2026-09-11T19:47:05.851Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:20:07","lastModifiedDate":"2026-09-11 20:20:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89765","Ordinal":"1","Title":"timers/itimer: Zero-init old itimerval before copy to userspace","CVE":"CVE-2026-89765","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89765","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntimers/itimer: Zero-init old itimerval before copy to userspace\n\nOn native sparc64, struct __kernel_old_timeval contains a four-byte hole\nafter tv_usec because tv_sec is 64-bit while __kernel_suseconds_t is 32-bit.\nput_itimerval() fills only the named fields in a stack-allocated\n__kernel_old_itimerval and copies the entire object to userspace, so\ngetitimer() can expose the two padding holes.\n\nZero-initialize the aggregate before assigning the fields so implicit\npadding is deterministic before it crosses the user/kernel boundary.","Type":"Description","Title":"timers/itimer: Zero-init old itimerval before copy to userspace"}]}}}