CVE-2026-46259
In the Linux kernel, the following vulnerability has been resolved: procfs: fix missing RCU protection when reading real_parent in do_task_stat() When reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent without proper RCU protection,…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: procfs: fix missing RCU protection when reading real_parent in do_task_stat() When reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent without proper RCU protection, which leads to: cpu 0 cpu 1 ----- ----- do_task_stat var = task->real_parent release_task call_rcu(delayed_put_task_struct) task_tgid_nr_ns(var) rcu_read_lock <--- Too late to protect task->real_parent! task_pid_ptr <--- UAF! rcu_read_unlock This patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add proper RCU protection for accessing task->real_parent.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.kernel.org/stable/c/0e64bd46a04a4fd61279aca9f53a664e9e5f7e7ePatch
- https://git.kernel.org/stable/c/1c8dc5b5517546c68ffae40b948336122bb61306Patch
- https://git.kernel.org/stable/c/4f9ae386861e280b7631ca252f798d25575627eePatch
- https://git.kernel.org/stable/c/73ec7c96601d61d52310c659145bb06d933a0fa6Patch
- https://git.kernel.org/stable/c/76149d53502cf17ef3ae454ff384551236fba867Patch
- https://git.kernel.org/stable/c/c93a33f28f915d446eea6fb3f0e1def0b3af1982Patch
- https://git.kernel.org/stable/c/dd8b13cb4ff1a4545a214ed897fdf2bc341155b6Patch
- https://git.kernel.org/stable/c/fefa0fcd78be465b7ad4c497fa6ec90d64194c04Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.