cve 2023 53749

CVE-2023-53749 is a Linux kernel vulnerability affecting the x86 user-memory clearing path. A subtle annotation error in the exception fixup mechanism could transform a recoverable user-space fault into a kernel oops, making ordinary file or direct-IO reads appear as filesystem bugs instead of safely returning -EFAULT. The bug did not introduce a new memory-corruption primitive but could cause system instability. A fix has been applied in recent kernel trees. This tag covers discussions and technical details about CVE-2023-53749, including its impact on x86 systems and the kernel patch that resolves it.