CVE-2021-47323 Details
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 21, 2024References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | < 4.4.276 >= 4.5, < 4.9.276 >= 4.10, < 4.14.240 >= 4.15, < 4.19.198 >= 4.20, < 5.4.134 >= 5.5, < 5.10.52 >= 5.11, < 5.12.19 >= 5.13, < 5.13.4 |
CPE
Remediation
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Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Apr 2, 2025 | Initial Analysis | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| Jul 3, 2024 | CVE Modified | CISA-ADP |
| May 28, 2024 | CVE Modified | kernel.org |
| May 21, 2024 | New CVE Received | kernel.org |