CVE-2025-39866: fs: writeback: fix use-after-free in __mark_inode_dirty()
fs: writeback: fix use-after-free in markinodedirty()
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.13-1 - Compensating control
Fix the writeback race in __mark_inode_dirty() by holding the inode spinlock until wb_wakeup_delayed() has finished, preventing access to a released bdi_writeback.
Event History
Frequently Asked Questions
What is the severity of CVE-2025-39866?
CVE-2025-39866 is classified as a high severity vulnerability due to the potential for a use-after-free condition that can lead to memory corruption.
How do I fix CVE-2025-39866?
To fix CVE-2025-39866, ensure you update to the patched version of the Linux kernel that addresses this vulnerability.
What systems are affected by CVE-2025-39866?
CVE-2025-39866 affects the Linux kernel, specifically versions that have not yet applied the security patch for this vulnerability.
What are the implications of CVE-2025-39866?
The implications of CVE-2025-39866 include potential system crashes and unauthorized access to sensitive information due to memory corruption.
Is CVE-2025-39866 being actively exploited?
As of now, there are no confirmed reports of CVE-2025-39866 being actively exploited in the wild, but it is recommended to apply patches promptly.