CVE-2026-46259

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

03/06/2026

Last modified:

22/07/2026

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 real_parent! task_pid_ptr real_parent.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	2.6.26 (including)	5.10.252 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.202 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.165 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.128 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.75 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.14 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	6.19.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-46259

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools