Answer in brief
CVE-2023-52629 records a High severity (CVSS 8.4) vulnerability in sh: push-switch: Reorder cleanup operations to avoid use-after-free bug. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), linux/linux_kernel (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 8.4. 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_kernel (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9f5e8eee5cfe1328660c71812d87c2a67bda389f <ff635d1f143b55fa005e9e43b16e6d8f677e90a5 || >=9f5e8eee5cfe1328660c71812d87c2a67bda389f <610dbd8ac271aa36080aac50b928d700ee3fe4de || >=9f5e8eee5cfe1328660c71812d87c2a67bda389f <246f80a0b17f8f582b2c0996db02998239057c65 | ff635d1f143b55fa005e9e43b16e6d8f677e90a5, 610dbd8ac271aa36080aac50b928d700ee3fe4de, 246f80a0b17f8f582b2c0996db02998239057c65 |
| Linux/Linuxgeneric | 2.6.20 | Not reported |
| linux/linux_kernelgeneric | >=9f5e8eee5cfe <610dbd8ac271 || >=9f5e8eee5cfe <246f80a0b17f || 2.6.20 | 610dbd8ac271, 246f80a0b17f |
Published upstream
Mar 29, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 3, 2026
In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below: (cpu 0) | (cpu 1) switch_drv_remove() | flush_work() | ... | switch_timer // timer | schedule_work(&psw->work) timer_shutdown_sync() | ... | switch_work_handler // worker kfree(psw) // free | | psw->state = 0 // use This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.
Quoted source text, attributed separately from HOL analysis.