CVE-2024-26622 : LINUX KERNEL UP TO 6.8-RC6 TOMOYO_WRITE_CONTROL USE AFTER FREE

Description

In the Linux kernel, the following vulnerability has been resolved: tomoyo: fix UAF write bug in tomoyo_write_control() Since tomoyo_write_control() updates head->write_buf when write() of long lines is requested, we need to fetch head->write_buf after head->io_sem is held. Otherwise, concurrent write() requests can cause use-after-free-write and double-free problems.

References

https://git.kernel.org/stable/c/2f03fc340cac9ea1dc63cbf8c93dd2eb0f227815

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