CVE-2023-1583: Null Pointer Dereference
First published: Fri Mar 24 2023(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.19<6.1.22 | |
| Linux Linux kernel | >=6.2.0<6.2.9 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=02a4d923e4400a36d340ea12d8058f69ebf3a383
- https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=io_uring-6.3&id=761efd55a0227aca3a69deacdaa112fffd44fe37
- https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=io_uring-6.3&id=761efd55a0227aca3a69deacdaa112fffd44fe37
- https://launchpad.net/bugs/cve/CVE-2023-1583
- https://security-tracker.debian.org/tracker/CVE-2023-1583
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1583
- https://nvd.nist.gov/vuln/detail/CVE-2023-1583
- https://ubuntu.com/security/CVE-2023-1583
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