{"api_version":"1","generated_at":"2026-07-28T12:20:08+00:00","cve":"CVE-2026-64375","urls":{"html":"https://cve.report/CVE-2026-64375","api":"https://cve.report/api/cve/CVE-2026-64375.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64375","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64375"},"summary":{"title":"proc: protect ptrace_may_access() with exec_update_lock (FD links)","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nproc: protect ptrace_may_access() with exec_update_lock (FD links)\n\nproc_pid_get_link() and proc_pid_readlink() currently look up the task from\nthe pid once, then do the ptrace access check on that task, then look up\nthe task from the pid a second time to do the actual access.\nThat's racy in several ways.\n\nTo fix it, pass the task to the ->proc_get_link() handler, and instead of\nproc_fd_access_allowed(), introduce a new helper call_proc_get_link() that\nlooks up and locks the task, does the access check, and calls\n->proc_get_link().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:20","updated_at":"2026-07-27 05:16:44"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1","name":"https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651","name":"https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638","name":"https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2","name":"https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d","name":"https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf","name":"https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383","name":"https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82","name":"https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64375","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64375","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 778c1144771f0064b6f51bee865cceb0d996f2f9 6253dfee5afba536bb54fc6fe6c091c3758fafe1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 778c1144771f0064b6f51bee865cceb0d996f2f9 65bf0d2b6e914f1448d6a2fde193dcf60936a651 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 778c1144771f0064b6f51bee865cceb0d996f2f9 de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 778c1144771f0064b6f51bee865cceb0d996f2f9 138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nproc: protect ptrace_may_access() with exec_update_lock (FD links)\n\nproc_pid_get_link() and proc_pid_readlink() currently look up the task from\nthe pid once, then do the ptrace access check on that task, then look up\nthe task from the pid a second time to do the actual access.\nThat's racy in several ways.\n\nTo fix it, pass the task to the ->proc_get_link() handler, and instead of\nproc_fd_access_allowed(), introduce a new helper call_proc_get_link() that\nlooks up and locks the task, does the access check, and calls\n->proc_get_link()."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-27T05:00:03.722Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1"},{"url":"https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651"},{"url":"https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf"},{"url":"https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2"},{"url":"https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638"},{"url":"https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383"},{"url":"https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82"},{"url":"https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d"}],"title":"proc: protect ptrace_may_access() with exec_update_lock (FD links)","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64375","datePublished":"2026-07-25T08:50:26.869Z","dateReserved":"2026-07-19T15:36:31.784Z","dateUpdated":"2026-07-27T05:00:03.722Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:20","lastModifiedDate":"2026-07-27 05:16:44","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64375","Ordinal":"1","Title":"proc: protect ptrace_may_access() with exec_update_lock (FD link","CVE":"CVE-2026-64375","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64375","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nproc: protect ptrace_may_access() with exec_update_lock (FD links)\n\nproc_pid_get_link() and proc_pid_readlink() currently look up the task from\nthe pid once, then do the ptrace access check on that task, then look up\nthe task from the pid a second time to do the actual access.\nThat's racy in several ways.\n\nTo fix it, pass the task to the ->proc_get_link() handler, and instead of\nproc_fd_access_allowed(), introduce a new helper call_proc_get_link() that\nlooks up and locks the task, does the access check, and calls\n->proc_get_link().","Type":"Description","Title":"proc: protect ptrace_may_access() with exec_update_lock (FD link"}]}}}