CVE-2026-99218
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
29/100
Published: 2026-11-02
Modified: 2026-11-03
First seen: 2026-11-02
Status: active
Attack Surface
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
High
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
In the Linux kernel, the following vulnerability has been resolved: coredump: hold RCU while releasing parked threads coredump_finish() releases the parked threads by clearing ->task in their core_thread entry and calling wake_up_process() on each of them. It does that without holding a reference on the task and without being inside rcu. But calling wake_up_process(task) without rcu here isn't safe. A parked thread doesn't need that wakeup to leave. A spurious wakeup or a preemption after the store is enough for the task to go away. So if the coredump client is preempted between the store and wake_up_process() the thread can exit and be freed in the meantime and try_to_wake_up() takes pi_lock in freed memory. Hold rcu across the loop.
Affected Software (15)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < fd0fbe84312fda2fc187428c92c50b7d03a9d24c |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < 71146c437bae59e5280f657965dc6d006ee3989b |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < 0fce73efee40c65ce26641c5d93942462f9e8307 |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < 16e94ed90b1b02398e044d41fd1db34828daa08e |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573 |
| Linux | Linux | 2.6.27 |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < fd0fbe84312fda2fc187428c92c50b7d03a9d24c |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < 71146c437bae59e5280f657965dc6d006ee3989b |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < 0fce73efee40c65ce26641c5d93942462f9e8307 |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < 16e94ed90b1b02398e044d41fd1db34828daa08e |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573 |
| Linux | Linux | a94e2d408eaedbd85aae259621d46fafc10479a2 < 61d58591aa0188bf2463e263962256316ff8b576 |
| Linux | Linux | 2.6.27 |