{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46259", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.108Z", "datePublished": "2026-06-03T15:49:56.428Z", "dateUpdated": "2026-06-03T15:49:56.428Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-03T15:49:56.428Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/proc/array.c"], "versions": [{"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "fefa0fcd78be465b7ad4c497fa6ec90d64194c04", "status": "affected", "versionType": "git"}, {"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "c93a33f28f915d446eea6fb3f0e1def0b3af1982", "status": "affected", "versionType": "git"}, {"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "1c8dc5b5517546c68ffae40b948336122bb61306", "status": "affected", "versionType": "git"}, {"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e", "status": "affected", "versionType": "git"}, {"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "73ec7c96601d61d52310c659145bb06d933a0fa6", "status": "affected", "versionType": "git"}, {"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "4f9ae386861e280b7631ca252f798d25575627ee", "status": "affected", "versionType": "git"}, {"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "dd8b13cb4ff1a4545a214ed897fdf2bc341155b6", "status": "affected", "versionType": "git"}, {"version": "06fffb1267c9d986687b69d74a46ee332a50575e", "lessThan": "76149d53502cf17ef3ae454ff384551236fba867", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/proc/array.c"], "versions": [{"version": "2.6.26", "status": "affected"}, {"version": "0", "lessThan": "2.6.26", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "5.10.252"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "5.15.202"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "7.0"}]}]}], "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"}}}}

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