CVE-2023-1583
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMar 24, 2023
First seenMar 24, 2023
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linux linux_kernel6.1.22, 6.2.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.19 ≤ v < 6.1.22, 6.2.0 ≤ v < 6.2.9 | 6.1.22, 6.2.9 |
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