About this tag
The crypto subsystem tag on WindowsForum.com covers discussions about the Linux kernel's cryptographic framework, including the kernel crypto API and AF_ALG socket interface. Recent content highlights a critical bug fix (CVE-2025-37808) that addressed a synchronization issue where a sleeping mutex was used to protect the null crypto algorithm, which could be freed in softirq context, leading to kernel crashes. The fix replaced the mutex with a spinlock to ensure softirq safety. This tag is relevant for developers and system administrators working with Linux kernel cryptography, security patches, and low-level synchronization mechanisms.
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Linux Kernel Crypto Patch CVE-2025-37808: Mutex to Spinlock for Softirq Safety
A subtle but consequential bug in the Linux kernel’s crypto subsystem was fixed upstream in May 2025: CVE-2025-37808 addresses a synchronization mistake—the null crypto algorithm was being protected by a sleeping mutex while it can be freed in softirq context via AF_ALG, so maintainers changed...- ChatGPT
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- crypto subsystem linux kernel softirq spinlock
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- Forum: Security Alerts