The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - cgroup: fix race between task migration and iteration When a task is migrated out of a css_set,     cgroup_migrate_add_task() first moves it from cset->tasks to cset->mg_tasks via:
    list_move_tail(&task->cg_list, &cset->mg_tasks); If a css_task_iter currently has it->task_pos pointing to     this task, css_set_move_task() calls css_task_iter_skip() to keep the iterator valid. However, since the     task has already been moved to ->mg_tasks, the iterator is advanced relative to the mg_tasks list instead     of the original tasks list. As a result, remaining tasks on cset->tasks, as well as tasks queued on     cset->mg_tasks, can be skipped by iteration. Fix this by calling css_set_skip_task_iters() before     unlinking task->cg_list from cset->tasks. This advances all active iterators to the next task on     cset->tasks, so iteration continues correctly even when a task is concurrently being migrated. This race     is hard to hit in practice without instrumentation, but it can be reproduced by artificially slowing down     cgroup_procs_show(). For example, on an Android device a temporary /sys/kernel/cgroup/cgroup_test knob can     be added to inject a delay into cgroup_procs_show(), and then: 1) Spawn three long-running tasks (PIDs     101, 102, 103). 2) Create a test cgroup and move the tasks into it. 3) Enable a large delay via     /sys/kernel/cgroup/cgroup_test. 4) In one shell, read cgroup.procs from the test cgroup. 5) Within the     delay window, in another shell migrate PID 102 by writing it to a different cgroup.procs file. Under this     setup, cgroup.procs can intermittently show only PID 101 while skipping PID 103. Once the migration     completes, reading the file again shows all tasks as expected. Note that this change does not allow     removing the existing css_set_skip_task_iters() call in css_set_move_task(). The new call in     cgroup_migrate_add_task() only handles iterators that are racing with migration while the task is still on     cset->tasks. Iterators may also start after the task has been moved to cset->mg_tasks. If we dropped     css_set_skip_task_iters() from css_set_move_task(), such iterators could keep task_pos pointing to a     migrating task, causing css_task_iter_advance() to malfunction on the destination css_set, up to and     including crashes or infinite loops. The race window between migration and iteration is very small, and     css_task_iter is not on a hot path. In the worst case, when an iterator is positioned on the first thread     of the migrating process, cgroup_migrate_add_task() may have to skip multiple tasks via     css_set_skip_task_iters(). However, this only happens when migration and iteration actually race, so the     performance impact is negligible compared to the correctness fix provided here. (CVE-2026-43439)

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Linux Distros Unpatched Vulnerability : CVE-2026-43439

medium Nessus Plugin ID 313379

Version 1.8

Version 1.6

Version 1.5

Version 1.3

Version 1.2

Version 1.1

Version 1.8 May 30, 2026, 12:49 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202605301249
Version 1.6 May 26, 2026, 12:31 PM CVSSv2 severity (based on CVE-2026-43439, severity decreased from "Medium" to "Low") CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:H/Au:S/C:N/I:N/A:C") CVSS metrics ("CVSSv2 score" set to 3.8) Plugin Feed: 202605261231
Version 1.5 May 25, 2026, 10:30 PM CVSS metrics ("CVSSv3 score" set to 4.7) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H") CVSSv3 severity (based on None, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202605252230
Version 1.3 May 20, 2026, 10:33 PM CVSS metrics ("CVSSv2 score" set to 6.2) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C") CVSS metrics ("CVSSv3 score" set to 7.5) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H") CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:U/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:U/RC:C") CVSSv2 severity (based on CVE-2026-43439, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202605202233
Version 1.2 May 9, 2026, 8:04 AM Plugin metadata Detection (updated detection logic) CVSS temporal metrics ("CVSSv3 temporal vector" set to none) CVSS temporal metrics ("CVSSv2 temporal vector" set to none) CVSS metrics ("CVSSv3 vector" set to none) CVSS metrics ("CVSSv3 score" set to none) CVSS metrics ("CVSSv2 vector" set to none) CVSS metrics ("CVSSv2 score" set to none) Plugin Feed: 202605090804
Version 1.1 May 9, 2026, 2:20 AM New Plugin Feed: 202605090220