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.
{
"cna_assigner": "redhat",
"cwe_ids": [
"CWE-476"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1583.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "affected kernel 5.19, 6.0, 6.1, 6.2, 6.3"
},
{
"last_affected": "affected kernel 5.19, 6.0, 6.1, 6.2, 6.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
}
]
}{
"extracted_events": [
{
"range": [
{
"fixed": "02a4d923e4400a36d340ea12d8058f69ebf3a383"
}
],
"source": "REFERENCES_COMMIT"
}
]
}