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Vulnerability · Published Mar 24, 2023 · Assigned by redhat

CVE-2023-1583

Medium 5.5

In plain English

A medium-severity null pointer dereference in Linux kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 88.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.25-1DEBIAN-CVE-2023-1583
Debian:13linux6.1.25-1DEBIAN-CVE-2023-1583
Debian:14linux6.1.25-1DEBIAN-CVE-2023-1583
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1009.9USN-6033-1
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1009.9UBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-1583
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-1583

Affected products (as reported)

VendorProductVersions
n/a Linux kernel affected kernel 5.19, 6.0, 6.1, 6.2, 6.3

Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References