Answer in brief
CVE-2026-99218 records a High severity (CVSS 7.0) vulnerability in coredump: hold RCU while releasing parked threads. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a94e2d408eaedbd85aae259621d46fafc10479a2 <fd0fbe84312fda2fc187428c92c50b7d03a9d24c || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <71146c437bae59e5280f657965dc6d006ee3989b || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <0fce73efee40c65ce26641c5d93942462f9e8307 || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <16e94ed90b1b02398e044d41fd1db34828daa08e || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573 | fd0fbe84312fda2fc187428c92c50b7d03a9d24c, 71146c437bae59e5280f657965dc6d006ee3989b, 0fce73efee40c65ce26641c5d93942462f9e8307, 16e94ed90b1b02398e044d41fd1db34828daa08e, a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c, b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573 |
| Linux/Linuxgeneric | 2.6.27 | Not reported |
| Linux/Linuxgeneric | >=a94e2d408eaedbd85aae259621d46fafc10479a2 <fd0fbe84312fda2fc187428c92c50b7d03a9d24c || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <71146c437bae59e5280f657965dc6d006ee3989b || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <0fce73efee40c65ce26641c5d93942462f9e8307 || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <16e94ed90b1b02398e044d41fd1db34828daa08e || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573 || >=a94e2d408eaedbd85aae259621d46fafc10479a2 <61d58591aa0188bf2463e263962256316ff8b576 | fd0fbe84312fda2fc187428c92c50b7d03a9d24c, 71146c437bae59e5280f657965dc6d006ee3989b, 0fce73efee40c65ce26641c5d93942462f9e8307, 16e94ed90b1b02398e044d41fd1db34828daa08e, a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c, b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573, 61d58591aa0188bf2463e263962256316ff8b576 |
Published upstream
Nov 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 2, 2026
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.
Quoted source text, attributed separately from HOL analysis.