{"api_version":"1","generated_at":"2026-06-04T13:01:08+00:00","cve":"CVE-2026-46259","urls":{"html":"https://cve.report/CVE-2026-46259","api":"https://cve.report/api/cve/CVE-2026-46259.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46259","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46259"},"summary":{"title":"procfs: fix missing RCU protection when reading real_parent in do_task_stat()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: fix missing RCU protection when reading real_parent in do_task_stat()\n\nWhen reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent\nwithout proper RCU protection, which leads to:\n\n  cpu 0                               cpu 1\n  -----                               -----\n  do_task_stat\n    var = task->real_parent\n                                      release_task\n                                        call_rcu(delayed_put_task_struct)\n    task_tgid_nr_ns(var)\n      rcu_read_lock   <--- Too late to protect task->real_parent!\n      task_pid_ptr    <--- UAF!\n      rcu_read_unlock\n\nThis patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add\nproper RCU protection for accessing task->real_parent.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-03 18:16:26","updated_at":"2026-06-03 18:16:26"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/fefa0fcd78be465b7ad4c497fa6ec90d64194c04","name":"https://git.kernel.org/stable/c/fefa0fcd78be465b7ad4c497fa6ec90d64194c04","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4f9ae386861e280b7631ca252f798d25575627ee","name":"https://git.kernel.org/stable/c/4f9ae386861e280b7631ca252f798d25575627ee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/76149d53502cf17ef3ae454ff384551236fba867","name":"https://git.kernel.org/stable/c/76149d53502cf17ef3ae454ff384551236fba867","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1c8dc5b5517546c68ffae40b948336122bb61306","name":"https://git.kernel.org/stable/c/1c8dc5b5517546c68ffae40b948336122bb61306","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e","name":"https://git.kernel.org/stable/c/0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd8b13cb4ff1a4545a214ed897fdf2bc341155b6","name":"https://git.kernel.org/stable/c/dd8b13cb4ff1a4545a214ed897fdf2bc341155b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c93a33f28f915d446eea6fb3f0e1def0b3af1982","name":"https://git.kernel.org/stable/c/c93a33f28f915d446eea6fb3f0e1def0b3af1982","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/73ec7c96601d61d52310c659145bb06d933a0fa6","name":"https://git.kernel.org/stable/c/73ec7c96601d61d52310c659145bb06d933a0fa6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46259","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46259","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e fefa0fcd78be465b7ad4c497fa6ec90d64194c04 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e c93a33f28f915d446eea6fb3f0e1def0b3af1982 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e 1c8dc5b5517546c68ffae40b948336122bb61306 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e 0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e 73ec7c96601d61d52310c659145bb06d933a0fa6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e 4f9ae386861e280b7631ca252f798d25575627ee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e dd8b13cb4ff1a4545a214ed897fdf2bc341155b6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06fffb1267c9d986687b69d74a46ee332a50575e 76149d53502cf17ef3ae454ff384551236fba867 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.26","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.26 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.252 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.202 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.165 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.128 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.75 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.14 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * 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":["fs/proc/array.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fefa0fcd78be465b7ad4c497fa6ec90d64194c04","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"},{"lessThan":"c93a33f28f915d446eea6fb3f0e1def0b3af1982","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"},{"lessThan":"1c8dc5b5517546c68ffae40b948336122bb61306","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"},{"lessThan":"0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"},{"lessThan":"73ec7c96601d61d52310c659145bb06d933a0fa6","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"},{"lessThan":"4f9ae386861e280b7631ca252f798d25575627ee","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"},{"lessThan":"dd8b13cb4ff1a4545a214ed897fdf2bc341155b6","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"},{"lessThan":"76149d53502cf17ef3ae454ff384551236fba867","status":"affected","version":"06fffb1267c9d986687b69d74a46ee332a50575e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/proc/array.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.26"},{"lessThan":"2.6.26","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.14","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.252","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.202","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.165","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.128","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.75","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.14","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.26","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: fix missing RCU protection when reading real_parent in do_task_stat()\n\nWhen reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent\nwithout proper RCU protection, which leads to:\n\n  cpu 0                               cpu 1\n  -----                               -----\n  do_task_stat\n    var = task->real_parent\n                                      release_task\n                                        call_rcu(delayed_put_task_struct)\n    task_tgid_nr_ns(var)\n      rcu_read_lock   <--- Too late to protect task->real_parent!\n      task_pid_ptr    <--- UAF!\n      rcu_read_unlock\n\nThis patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add\nproper RCU protection for accessing task->real_parent."}],"providerMetadata":{"dateUpdated":"2026-06-03T15:49:56.428Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fefa0fcd78be465b7ad4c497fa6ec90d64194c04"},{"url":"https://git.kernel.org/stable/c/c93a33f28f915d446eea6fb3f0e1def0b3af1982"},{"url":"https://git.kernel.org/stable/c/1c8dc5b5517546c68ffae40b948336122bb61306"},{"url":"https://git.kernel.org/stable/c/0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e"},{"url":"https://git.kernel.org/stable/c/73ec7c96601d61d52310c659145bb06d933a0fa6"},{"url":"https://git.kernel.org/stable/c/4f9ae386861e280b7631ca252f798d25575627ee"},{"url":"https://git.kernel.org/stable/c/dd8b13cb4ff1a4545a214ed897fdf2bc341155b6"},{"url":"https://git.kernel.org/stable/c/76149d53502cf17ef3ae454ff384551236fba867"}],"title":"procfs: fix missing RCU protection when reading real_parent in do_task_stat()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46259","datePublished":"2026-06-03T15:49:56.428Z","dateReserved":"2026-05-13T15:03:33.108Z","dateUpdated":"2026-06-03T15:49:56.428Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-03 18:16:26","lastModifiedDate":"2026-06-03 18:16:26","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46259","Ordinal":"1","Title":"procfs: fix missing RCU protection when reading real_parent in d","CVE":"CVE-2026-46259","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46259","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: fix missing RCU protection when reading real_parent in do_task_stat()\n\nWhen reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent\nwithout proper RCU protection, which leads to:\n\n  cpu 0                               cpu 1\n  -----                               -----\n  do_task_stat\n    var = task->real_parent\n                                      release_task\n                                        call_rcu(delayed_put_task_struct)\n    task_tgid_nr_ns(var)\n      rcu_read_lock   <--- Too late to protect task->real_parent!\n      task_pid_ptr    <--- UAF!\n      rcu_read_unlock\n\nThis patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add\nproper RCU protection for accessing task->real_parent.","Type":"Description","Title":"procfs: fix missing RCU protection when reading real_parent in d"}]}}}