CVE-2023-1583

Description

A NULL pointer dereference was found in io_file_bitmap_get in io_uring/filetable.c in the io_uring sub-component in the Linux Kernel. When fixed files are unregistered, some context information (file_alloc_{start,end} and alloc_hint) is not cleared. A subsequent request that has auto index selection enabled via IORING_FILE_INDEX_ALLOC can cause a NULL pointer dereference. An unprivileged user can use the flaw to cause a system crash.

References

Link	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=io_uring-6.3&id=761efd55a0227aca3a69deacdaa112fffd44fe37	patch mailing list
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=02a4d923e4400a36d340ea12d8058f69ebf3a383	patch mailing list

Frequently Asked Questions

What is the severity of CVE-2023-1583?: CVE-2023-1583 has been scored as a medium severity vulnerability.
How to fix CVE-2023-1583?: To fix CVE-2023-1583, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-1583 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-1583 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-1583?: CVE-2023-1583 affects n/a Linux kernel.

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Description

Category

CWE-476 – NULL Pointer Dereference

References

Frequently Asked Questions