{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nexec: Cleanup POSIX timers right after de_thread()\n\nA per-thread CPU timer holds a reference to the PID of the thread it is\nattached to and, while it is armed, its node is queued in that thread's\nposix_cputimers. The task is looked up by that PID.\n\nWhen a non-leader thread exec()s, de_thread() changes which task owns\nthat PID. pid_task(timer->it.cpu.pid, PIDTYPE_PID) then returns NULL,\nbut the node is still queued on tsk, which is alive. timer_lock_sighand()\ntakes a failed lookup to mean that the node is already dequeued, so it\nhas nothing to undo.\n\nbegin_new_exec() calls posix_cpu_timers_exit(me) right after\nexec_task_namespaces() and that removes the leftover node, so the state\nnormally stays invisible. But bprm->point_of_no_return is set before\nde_thread(), so if unshare_files(), set_mm_exe_file(), exec_mmap() or\nexec_task_namespaces() fails, the task dies before it gets there.\nexit_itimers() then frees the k_itimer while its node is still queued,\nand reaping tsk later erases that freed node from the rbtree.\n\nIn short:\n\n the non-leader thread B the parent\n\n timer_create(CLOCK_THREAD_CPUTIME_ID)\n timer_settime()\n arm_timer() // the node is queued on B\n execve()\n de_thread(B)\n exchange_tids(B, leader) // B's PID now belongs to the leader\n release_task(leader)\n __exit_signal(leader)\n posix_cpu_timers_exit(leader) // cleans leader's queue, not B's\n __unhash_process(leader) // that PID has no task anymore\n exec_mmap()\n mmap_read_lock_killable(old_mm)\n kill(B, SIGKILL)\n // -EINTR\n get_signal()\n do_exit()\n exit_itimers()\n posix_timer_delete()\n posix_cpu_timer_del()\n posix_timer_unhash_and_free() // freed while still queued\n wait4()\n release_task(B)\n posix_cpu_timers_exit(B)\n cleanup_timerqueue()\n timerqueue_del() // use-after-free\n\nMove the POSIX timer cleanup right after de_thread() before any of the\nlater failure conditions brings the task into do_exit().\n\n[ tglx: Move the cleanup right after de_thread() ]", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98260" }, { "summary":"CVE-2026-98260 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-98260.json" }, { "summary":"openEuler-SA-2026-4718", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4718" }, { "summary":"CVE-2026-98260", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-98260&packageName=kernel" } ], "title":"openEuler cve CVE-2026-98260", "tracking":{ "initial_release_date":"2026-11-09T10:46:29+08:00", "revision_history":[ { "date":"2026-11-09T10:46:29+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-11-09T10:46:29+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-11-09T10:46:29+08:00", "id":"CVE-2026-98260", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"openEuler-22.03-LTS-SP4", "name":"openEuler-22.03-LTS-SP4" }, "name":"openEuler-22.03-LTS-SP4", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"bpftool-5.10.0-340.0.0.241.oe2203sp4.aarch64.rpm", 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"category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-98260", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nexec: Cleanup POSIX timers right after de_thread()\n\nA per-thread CPU timer holds a reference to the PID of the thread it is\nattached to and, while it is armed, its node is queued in that thread's\nposix_cputimers. The task is looked up by that PID.\n\nWhen a non-leader thread exec()s, de_thread() changes which task owns\nthat PID. pid_task(timer->it.cpu.pid, PIDTYPE_PID) then returns NULL,\nbut the node is still queued on tsk, which is alive. timer_lock_sighand()\ntakes a failed lookup to mean that the node is already dequeued, so it\nhas nothing to undo.\n\nbegin_new_exec() calls posix_cpu_timers_exit(me) right after\nexec_task_namespaces() and that removes the leftover node, so the state\nnormally stays invisible. But bprm->point_of_no_return is set before\nde_thread(), so if unshare_files(), set_mm_exe_file(), exec_mmap() or\nexec_task_namespaces() fails, the task dies before it gets there.\nexit_itimers() then frees the k_itimer while its node is still queued,\nand reaping tsk later erases that freed node from the rbtree.\n\nIn short:\n\n the non-leader thread B the parent\n\n timer_create(CLOCK_THREAD_CPUTIME_ID)\n timer_settime()\n arm_timer() // the node is queued on B\n execve()\n de_thread(B)\n exchange_tids(B, leader) // B's PID now belongs to the leader\n release_task(leader)\n __exit_signal(leader)\n posix_cpu_timers_exit(leader) // cleans leader's queue, not B's\n __unhash_process(leader) // that PID has no task anymore\n exec_mmap()\n mmap_read_lock_killable(old_mm)\n kill(B, SIGKILL)\n // -EINTR\n get_signal()\n do_exit()\n exit_itimers()\n posix_timer_delete()\n posix_cpu_timer_del()\n posix_timer_unhash_and_free() // freed while still queued\n wait4()\n release_task(B)\n posix_cpu_timers_exit(B)\n cleanup_timerqueue()\n timerqueue_del() // use-after-free\n\nMove the POSIX timer cleanup right after de_thread() before any of the\nlater failure conditions brings the task into do_exit().\n\n[ tglx: Move the cleanup right after de_thread() ]", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP4:bpftool-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:bpftool-debuginfo-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debuginfo-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debugsource-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-devel-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-headers-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-source-5.10.0-340.0.0.241.oe2203sp4.aarch64", 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"openEuler-22.03-LTS-SP4:kernel-tools-devel-5.10.0-340.0.0.241.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:perf-5.10.0-340.0.0.241.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:perf-debuginfo-5.10.0-340.0.0.241.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:python3-perf-5.10.0-340.0.0.241.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:python3-perf-debuginfo-5.10.0-340.0.0.241.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:kernel-5.10.0-340.0.0.241.oe2203sp4.src" ], "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4718" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.8, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":[ "openEuler-22.03-LTS-SP4:bpftool-5.10.0-340.0.0.241.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:bpftool-debuginfo-5.10.0-340.0.0.241.oe2203sp4.aarch64", 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