PT-2023-2853 · Linux · Linux Kernel

Xingyuan Mo · Published 2023-05-21 · Updated 2025-03-18 · CVE-2023-33250

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel version 6.3

Description The issue is related to a use-after-free in the iopt unmap iova range() function in the drivers/iommu/iommufd/io pagetable.c module of the Linux kernel. This could allow an attacker to cause a denial of service by exploiting the use of previously freed memory.

Recommendations For Linux kernel version 6.3, consider disabling the iopt unmap iova range() function as a temporary workaround until a patch is available. Restrict access to the io pagetable.c module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

NULL Pointer Dereference

Weakness Enumeration

CWE-416

CWE-476

Related Identifiers

BDU:2023-02798

CVE-2023-33250

ROSA-SA-2023-2241

Affected Products

Linux Kernel

References · 22

• https://bdu.fstec.ru/vul/2023-02798 · Security Note
• https://osv.dev/vulnerability/CVE-2023-33250 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-33250 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-33250 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-33250 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-33250 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-33250 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-33250 · Security Note
• https://lore.kernel.org/linux-iommu/ZDabT%2FuRl%2FjxFhm0%40ip-172-31-85-199.ec2.internal/T · Note
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=804ca14d04df09bf7924bacc5ad22a4bed80c94f · Note
• https://abf.rosalinux.ru/advisories/ROSA-SA-2023-2241 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-33250 · Note
• https://bugzilla.suse.com/show_bug.cgi?id=1211597 · Note
• https://lore.kernel.org/linux-iommu/[e-mail]/T · Note
• https://t.me/cvenotify/115242 · Telegram Post